First very cool ideas indeed. I was always sceptical for changes for my favorite civ but I think those ideas keep the idea Doviello are about. I actually consider these mechanics very cool and I will definitely try it once again I get a version of windows that works. Still I have some points.
First a strategical one.
In your modmod this strategy is even more effective as you will have shock I/combat II after 4 turns and don't even need a scout that gives you the first xp (If you get him it is of course still better). Additionally Lucian will regenerate very quickly as the scavenger promotion grants him a healing rate equal to neutral terrain, you lose no precious turns if he gets seriously injured before gaining the march promotion and if you miss 1 xp for a new promotion that regenerates him you will get it after two turns. The higher XP rate per killed unit accelerates the process from combat I to Combat III+March+ShockI+II even more. Once you reach Heroic Strength I he is invincible anyway. I'm anxious to know how many opponents I can crush in hundred turns in Doviello + (my record for FFH was 3). The only thing that disturbs me is that Charadon has lost barbarian as that means you really have to take care of the barbs which can be more than an annoyance if you raze every city the AI built wrong/ you cannot support. But there has to be a certain challenge and thus I'm not really complaining. All in all Doviello got much stronger warmongers and Charadon is IMHO even a bit overpowered right now.
The flavor mechanics are also very cool. The Mammoth riders remind me of the Wildlings from Song of Ice and Fire and I loved that part where Jon was on their side for a while.
I will also try the animal mechanic. It does not help a lot for the strategy I described, but as I always love new ways to play the game I want to find the synergies hidden in them. (Ah and I'd love to see Fenrir as a late game unit for them. IMHO would fit them very good)
At last a question (as I can't try it right now): Can slaves use the duel system? As this way Slavery would also be very useful for Charadon as he could duel all his slaves before upgrading the best ones to warriors (This way he would not have to pay the costs - just for the surviving ones) Would also fit flavorwise: Slaves are thrown in the pits with nothing but their pure body to fight each other. Only those that face up to these fights and survive them are not killed by the beastmen watching and are perhaps integrated into the pack.
First a strategical one.
I don't know, but in my games with Charadon in vanilla FFH I always had more than 20something XP with Lucian before having built 6 to 7 warriors and I actually did nothing else but building warriors. Just declare war on the first dude you see and attack his scout which will get you about 4 xp and shock I then go for his capital and attack it with the protection of the other units available from the start. As the first units the AI has are still warriors without promotions your chance to win these fights is very high and attacking gives you very many xp so you will get one more likely two promotions which turn Lucian very quickly into a killing machine.Honestly, I'm a bit worried about it too, but things like a spawn rate can be toned down easily, promotion effects can be played with, etc... My primary concerns are actually the Duel System/XP share.... Tried just sitting Lucian in my capital, building warriors and then dueling them... ended up after sacrificing 6 or 7 with warriors starting at 20something xp.Yes, it may take more time than just using them for a warrior rush... But it's MUCH more effective. Not a whole lot can stand up to a shock2 warrior early game.
In your modmod this strategy is even more effective as you will have shock I/combat II after 4 turns and don't even need a scout that gives you the first xp (If you get him it is of course still better). Additionally Lucian will regenerate very quickly as the scavenger promotion grants him a healing rate equal to neutral terrain, you lose no precious turns if he gets seriously injured before gaining the march promotion and if you miss 1 xp for a new promotion that regenerates him you will get it after two turns. The higher XP rate per killed unit accelerates the process from combat I to Combat III+March+ShockI+II even more. Once you reach Heroic Strength I he is invincible anyway. I'm anxious to know how many opponents I can crush in hundred turns in Doviello + (my record for FFH was 3). The only thing that disturbs me is that Charadon has lost barbarian as that means you really have to take care of the barbs which can be more than an annoyance if you raze every city the AI built wrong/ you cannot support. But there has to be a certain challenge and thus I'm not really complaining. All in all Doviello got much stronger warmongers and Charadon is IMHO even a bit overpowered right now.
The flavor mechanics are also very cool. The Mammoth riders remind me of the Wildlings from Song of Ice and Fire and I loved that part where Jon was on their side for a while.
I will also try the animal mechanic. It does not help a lot for the strategy I described, but as I always love new ways to play the game I want to find the synergies hidden in them. (Ah and I'd love to see Fenrir as a late game unit for them. IMHO would fit them very good)
At last a question (as I can't try it right now): Can slaves use the duel system? As this way Slavery would also be very useful for Charadon as he could duel all his slaves before upgrading the best ones to warriors (This way he would not have to pay the costs - just for the surviving ones) Would also fit flavorwise: Slaves are thrown in the pits with nothing but their pure body to fight each other. Only those that face up to these fights and survive them are not killed by the beastmen watching and are perhaps integrated into the pack.
Basically, it allows you to turn your extra animals loose if you want, and still use them against your enemy... Plop a griffon den next to a civ's borders and watch their workers die. 
I must admit giving a group of bears a stealthy sounding name is almost equally amusing), so I added Bear Cubs. Seemed fitting, and provided another weak item for scouts to get early XP off of (since there were now so many more things to kill them, it was quite needed).
