First thought: Ye Gods, that's way too many Bulgar units. Good thing they made peace.
As for the Magyars, I think it best to go ahead and sign alliance with the Bulgars against them. Can't think of a better thing for either of their units to do than beat up on each other. We are not ready to attack the Abbasids anytime before Cataphracts and not for some time even then.
I go ahead and give Castle Building to the Bulgars for the alliance. Best to get the alliance clock started now. I also get the Kievan Rus in as well. I establish embassy with the Rus - their capital has 8 units in it already, and 10 shields/turn builds them a Berserk in 3 turns. Horseback Riding isn't enough for the alliance, so I just give that to them, then trade Castle Building plus 3gpt for the alliance.
Can also bring France in. An embassy shows their capital at size 10, building Wealth

, with TWENTY-FOUR units in it, mostly spearmen. I can't think of a better thing for them to do with those units than attack the Magyars, so I give Early Siegecraft to France for an alliance.
Our economy looks very good, making 100 gpt income! Much better than the Norwegians.

England can pay 87 + 5/turn for Early Siegecraft, pretty close to market value; sold.
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963 AD: Norse Tradition has come in, and Seafaring is indeed out there. It would cost about 125 gold in trade, which is way cheaper than it should be. There's definitely something screwy with trading costs on the optional branches in this scenario. We can trade Early Siegecraft to any of the Viking civs for it; I pick Norway because they're probably the weakest.
Next research is a tough call. We could actually research Smithing or Lost Roman Secrets ourselves in 22 turns, or Code of Laws in 11, or Medieval Combat in 15. Well, Smithing is out as it should be a cheap trade. Medieval Combat is also out as the AIs will prioritize that and have had Siegecraft for a while.
So the question is whether to push to our Cataphracts, or push up the global tree and stay in the brokering loop. We could also run minimum and save up, maybe steal onto the Christian or Muslim branch. Too bad we have no shot at the Holy Roman Empire.
Final answer is to research Lost Roman Secrets at max. We would like our aqueducts soon, we do want to get our Cataphracts sometime this millennium, and we can probably eventually trade the tech to the Rus.
966 AD: Iron is hooked up - thank you Charis for using the Ctrl-R worker trick - and we upgrade three warriors. Little action on the Magyar front just yet. I realize now that one of the Dromons should be at home keeping an eye out for Magyar boats to hit for a Golden Age.
972 AD: Code of Laws is around but no good deals yet. (Good thing I didn't self-research that.) Looks like France was the one to get it and pocket everyone else's gold. Sweden has Smithing too, at monopoly for the moment.
The Magyars buy the Poles into alliance against us. I'm not worried.
975 AD: Lose two swordsmen and a horse attacking a lucky spear from hell. Now I realize that what we really need is Catapults, same as in the Fall of Rome game. Constant can build 'em every turn, conveniently enough, though they do cost unit maintenance...
France buys Burgundy in against the Magyars.
978 AD: The Magyar action is starting to heat up. Three spears just walked into our territory; we lose one horse in clearing them out. Getting a couple catapults up to the front line, though. Lose a couple spears between turns.
981 AD: Bulgar and Magyar forces are clashing resoundingly over in the west. Finally some luck for us as a defending horseman beats an attacking archer and goes elite. Next turn that horseman finally manages to pillage a road tile, that forces the Magyars through a stop-and-kill zone at Veliki.
984 AD: Some catapults arrive and the northern border is just about secure. Still no brokering to do...
BT: Oh great. A Swedish berserk moved up next to Sofia (our way far northeast city). Sneak-attacking or just exploring?
Poles complete Holy Roman Empire.
987 AD: Between turns, Sweden declares war on us and of course we lose Sofia.
And, oh great, the Bulgars dropped off an archer by boat right next to Constantinople. We have RoP so can't even demand that they withdraw.
And, oh GREAT, there are three Abbasid horsemen coming up next to our border. Embassy shows them at war with nobody (they've barely even contacted anybody), so it looks like we're the target. Jerusalem has 10 spears and is building an assassin.
This is getting UGLY with a capital UGH...
990 AD: At least there's brokering available. Germany and Cordova got Medieval Combat.
59 gpt goes to Cordova for Medieval Combat. Trading that plus 5g to Denmark gets us both Code of Laws and Smithing. (Yay!, but why is our one tech worth two of his?) Town Halls ordered up in many cities and a Blacksmith in Constantinople.
We can resell some of those techs around to everyone else for alliances, which I strongly recommend. I leave all of that for the next leader.
Since the Bulgars and Abbasids are about to sneak attack us, you can sign alliances with them against anyone you like without worrying about a 20-turn limitation.
Good luck to whoever goes next. Either Speaker or Arathorn, whoever can play can take it.
T-hawk << Just Played
Arathorn << Up Now
Jabah
Charis
Speaker << Up Now if he wants it, otherwise skipped
http://www.civfanatics.net/uploads6/rbc13a-990ad.zip