I’ve just found team with LB2 Li Xiu (counterattack) and Elena.
Counterattacks don’t stack. Elena’s riposte overwrites LB2 Li Xiu aether power
There is riposte from LB2
3 turns left and then Elena is firing…
So, during waves, they probably will overwrite each other. I can’t check more. I won’t risk LB2 him, if he really overwrites his riposte.
PS. I think, the same could be also with LB2 Wu Kong 