so we tried a new MP with 2.91 AND 1.73 Beta:
WE didn't change anything from RevDCM, what is boring is that archer can't bombard anymore this is realy boring.
But no OOS so far, no CTD, well everything is fine, and we are after christ now on a huge (immense) map 11 civ, Barb all on, rev on, ruthles, different difficultys by human players (no flexible), Archipelagos.
We played only with 3humans, as a test it was positve.
We will try with Archer Bombard ON, to see, if the OOS came realy from that, maybe it is only The attack support or and the Stack attack that is the problem. anyway I hope so, cause to play without The archer able to bombard is something missing.