Wars of the Diadochi

Ah, stoic is now gettin' addicted to RPs! Welcome to the gang pal.
Only problem is dat there weren't that many nations back then, but I think you can work it out

I'd recommend playing this as characters instead of nations. While, say, Alexander's son didn't control any actual nation, it'd be interesting to conduct intrigues as him. People like Eumenes, too, didn't exactly have a nation in their hands.

And some with neither, only dependent on intrigue to survive.

I would so dig that. My main problem with Alt hists spanning long periods of time (I enjoy them extremely but there is its flaws) is that it's just a siege this. I would so play a character if it meant I could play a complex battle. I have a sort of system for disasters. Before and during an engagement you roll for both sides (Unless it's player verse player I will get to that.) to see if either side has a disaster. We would have roll modifiers (say if you secured extra supplies and there is a possibility of running out you get a +1 modifier up for the result no matter what if the action to modify it corresponds to the situation) A standard would be an 8. So for some examples (I take the first one from a cavalry charge Alexander the Great took when he led the cavalry in Greece against I think Athenians and someone else) Say you roll a 10/11 for a mistake on the enemies side that would mean they have left an area open (Against NPC) and you would roll for a cavalry charge to split the army and there is a negative 30 Morale  if succeeding.(Morale is influenced by supply, leadership, previous battles, numbers, and possibly ethnicity if we want a complexer system.) Now say you roll a 12, that would (The way this works is the higher the roll the worse the disaster as we are going from bottom to top) mean some soldiers rebel for some reason (Provided by player or GM) mid battle. That would be a minus 35 Morale as the men are now likely to rebel and the leader would have suspicion.  That is some examples. For player vs player it would be that you roll for disasters for yourself and actions for yourself.  Where as against NPC you roll for disasters on yours and there side.

And is Gen.lib blocked as well?

I would like that. If you were to have economic success you should have like a modifier for like +1 on the dice unless max. Morale should have a large modifier from supplies, speeches, numbers, technology, leadership, marching distance, previous fights, position, and ethnicity just because it would give it a feeling of continuity and realism. I agree with you on the personal dimension because it adds a "Don't let the general be killed because he is useful" feeling. I feel like an in depth campaign like this should require both players to be active to fight in a battle. Back to the first statement. I feel like if you have a success in economy (say helping people out of poverty) you should over time have modifiers that give +1  to any roll unless max for skill. I also agree to the last statement with nothing to add.

Yeah. This should be the before battle modifier. The modifier would help to the corresponding situation (Experience and leadership help with not routing mid battle and not rebelling etc).  I do really like this as a battle idea. I feel like we should have multiple stages with actions in them so .

Skirmish: This decides who has archer superiority, if both sides skirmish that means light cavalry fighting and heavy archer to archer combat. Either side can skip this if they lack archers and go straight to the next phase but if both sides fight whoever wins this can have most control over archer fire and bombard oncoming units.

Battle: Where the enemies engage.

Defense (sub category of battle if the defenders archers win and they have defensive preparations but not a fort or city) The defenders gain a overall defensive +1/2 depending on the strength of the defense. Here the attackers try to break or go around the defenses. 

Attack (if the attackers win or one side decides to skip Skirmish also sub Category under the battle part of it)  The attackers can now possibly bombard or straight up attack the enemy (the latter is the most probable) and here (and in Defense and Battle) is where you command units to engage other enemy units. 

Retreat: Here is if you decide to run down the enemy, the higher the roll the more killed or captured. Modifiers such as speed and tiredness play on both sides. if you roll a 12 with at least a 2+ modifier over 12 you capture the general.