Elod

AI allies do not work on besiege maps because the fortress is considered a "creep" and thus will not be targeted by the AI.

Create a Hero has always been buggy from vanilla. It is best to not have then enabled in PvP to avoid crashes.

They will not. Combo hordes had too many bugs, balance issues, and were designed  to work with BFME1's small battalion sizes.

Hi, it sounds like you are having some connection or incompatible issues. Head over to the AotR Community Discord and go to the #support channel and you may find the help you need.

Nerevar42 if in the future you continue to expand your initial post, please put the date that you added to it before you update (example 1/1/2021- johndoe has pink sword, missing ai on x map, etc). Or you can reply to the post, or start a new topic/thread.
That way it makes it easier for us to go through and find bugs.