@keyser uef will already push with cheap nano-regen and shields while sera com wouldn't have nanoregen because too expensive
no t2 turrets for sera = lose in that case (however, sera nano will be uselles too because UEF still can OC ilshas unless you have a bunker)
also, you're mistaken, ilshas have 2500 hp, so to OC them you need only 1 energy storage (6500E to OC). To OC pillars you still need 1 energy storage (without it you can't even overcharge)
pillars are covered with 3000HP shields. You can't even kill anyone with your OC while shields is up, while your expensive ilshas dying and you can do nothing.
UEF com just needs to click one button when he got 6500e to make a lot of damage to your army, and you can't punish him for that. He just has 30 range, gonna kill ilshas and retreat to his spam if you dear to attack him. Attack with less army, because he already killed atleast 1 ilsh and gonna kill few again before you even can destroy shields
aeon can cover obsidians with shields too
aeon can overcharge ilshas from 35 range (sera can do nothing with 35 range except bunker) and also may go chrono that will just destroy sera army, RIP sera
well, ok, cybran are not the main problem here
So i'll repeat myself UEF is the best faction to destroy sera on t2 and sera can do nothing with it except bunkerbuilding