Now my question, I was thinking of producing a lot of artillery and fighting a slow war to whittle down their forces then counter attack slowly into their land; Is this a good strategy for the current situation? what would you suggest?
Another important note, I started my war with the top civ ahead of them in technology and now that civ is ahead of me and starting to run away in the tech race. Me and that civ are the only 2 civs so advanced so I can't just trade techs to catch up
The game difficulty is Monarch, it is max on ai aggression, accelerated production is on, and domination/conquest are the only victory conditions, and I am also playing as Germany.
I had a look at your save in CivAssist, and you could be in trouble.
You are indeed falling behind in tech. Although you have SciMethod and built ToE (good), you didn't leverage it very well (bad): the 'classic' tech-choices here are AtomTheory and Electronics, the 2 most expensive techs of the Industrial -- but you didn't take them. If you had, you could have traded those three techs for nearly everything else, while also (pre) building Hoover Dam for yourself, to boost the Factories you're building right now (if you have a suitable Factory-city, it might still be worth starting a Palace-prebuild there, so that you can switch it to Hoovers when you get/buy Electronics). And although you have most of the obligatory Industrial techs, you need 12T to get MotorTrans, and you've put no beakers into it yet. Conversely, Sumeria has MotorTrans already (monopoly, but them knowing it has made it
cheaper for you to research!), and Atomic Theory is also known -- and I think I saw that someone (possibly also Gil) has Flight as well. This means that Electronics and/or Espionage are likely being researched by the AIs right now -- and if Gil does have Flight already, then once he gets Electronics, he'll be into the Modern Age. If he then gets Computers (MechInf) as his freebie, then even with Panzers, you're going to have a tough time beating him.
Of the other unknown techs, the one you need most right now is actually Sanitation! Your cities have all been placed to use 16-20 exclusive-BFC tiles, most of which are already improved -- but none of those cities has a Hospital yet, so you can't even make the most of the territory you already hold. Building cities so loose also means you've been wasting tile-output (and Worker-moves) for the entire game! So you might actually be better off dumping the run at Motors, and try and grab a monop on San (which is still cheaper -- you should be able to get it in 7-8T at SCI%=100). Once it comes in, try and trade it for the other Ind-Age techs you're missing, perhaps topping up the sale using your gold reserve. Your Treasury is doing you no good otherwise, since you can't cash-rush under Communism (and gold can easily be replaced -- if you zero SCI% after you get San, you could rake in >500 GPT!).
Speaking of which, were you going for SCI% or TAX% in this game? I ask because although you've built Libs+Unis in most cities, you've also built (or are building) Banks+StockExes in them as well (and you're building WallSt in Berlin). Purely commercial improvements only multiply the TAX%-slice of your commerce per turn, so they do you no good at all when SCI%=100, because TAX% is at zero (Markets are fine to build in a science-game though, because they also multiply Lux-happiness). Given that you are already behind in techs, though, it may actually be worth (after Sanitation) just going full-on TAX%=100 for a while, and using gold to buy the remaining Ind-Age techs (and maybe the first couple of Modern techs) from other Civs as soon as you can afford them (all of the other SCI-civs on the map are scheduled for demolition anyway, so you might as well get what you can from them before you kill them). Until then, though, I would convert Bank and StockEx builds-in-progress into Factories, Courthouses or Arty-builds.
AND YOU HAVEN'T BUILT YOUR FP YET !!! Doing so ASAP will cut corruption/waste
everywhere, since you're Commie: Medina would be probably be a good place for it, so switch the Bank build-in-progress to FP. Build Courthouses too -- in all your cities -- better to increase useful SPT/CPT
before building multiplier-buildings. You could disband units into CH-builds, and/or whip your citizens, to get the CHs up in 1T (4 Cav-disbands, or 4 citizens whipped, or 2 of each = 80s = 1 CH). As a Commie, you could also do with getting Espionage and building your SPHQ, but that can wait until you've made inroads into Sumeria (or Korea) -- maybe use an MGL for it... However, even if you reduce/ eliminate the ~30% wastage in all your cities (which should be possible -- with only 24 cities, you're still well under the OCN/Nopt for a Huge Monarch map), your shield-output will still be ridiculously low. Apart from Berlin (which already has a Factory), all of your Pop12 cities are making only 10-16SPT, accoridng to CivAssist (and even Berlin is only making 25SPT). Are you
sure you have AccProd switched on? (NB CivAssist says AI Aggression is normal, not high -- so I'm not sure how reliable your game description is.)
Cities stuck at Pop12 only need 24FPT to keep from starving, but you have nearly everything irrigated -- I shudder to imagine how much food you're wasting, that could be turned into shield-output, either by reassigning citizens to low-FPT/high-SPT tiles, or by mining already-railed BGrass and Plains. You already have 17 Workers and 35 Slaves -- at least until you can build Hospitals, they should be stack-mining your railed flatland (not doing solo Jungle-clearing and other similarly useless tasks!). With RepParts, it only takes 3 Workers/6 Slaves to mine flatland in 1T -- so you could be mining 11.5 tiles per turn, just with what you've got now (and if unhappiness becomes a problem in any city, build more Workers/ Slaves out of it, and improve terrain even faster).
Once you're well on the way to fixing all the above problems, and have got mines built, your Factories will finish faster. Once all your cities have at least a Rax, CH, Market, and Factory, then, yes, start building Arty. Lots of Arty -- at least until you can start building Panzer instead. You might also want to consider building Cavs in high-SPT cities, then disbanding them into construction projects in other towns, to finish those builds faster as well. When you acquire MotorTrans, Mobilising might be sensible, to get your Panzer-numbers up quickly. It's not like you're going to be signing peace any time soon, is it? (But if you really need to end mobilization, signing peace with a weakened civ will do it, and then you can re-DoW and finish them off). And once you get Flight, some Fighters/Flaks might not be a bad idea either, given that Gil is probably already building Bombers as well as Tanks. Once you've mopped up his roving Inf-stacks, you'll probably want Bombers yourself, to demolish/kill his city defenders, and reduce your Panzer-losses when taking his cities.
Oh, and when the war starts, try and buy in some Allies: the Hitties and the Japs would be my choices, since they're the next biggest/most advanced civs after you and the Sumerians -- that way, Gil will split his forces. And if he also buys in the Koreans and Arabs against you, so much the better -- that will give you a cassus belli to consolidate your end of the continent (and if your trade-rep is still clean and you can buy techs using per-turn payments, DoWs from the Civs who sold you the techs can even save you some GPT...).
Good luck.
