E0S1 Robin, E2S1 Bronya Kinda troll but not really, robin so OP that she literally BIS in almost every single Crit DPS in the game including blade and jingliu.
Bronya Robin Gallagher is such a good combo. I had some fun using it recently with Jingliu (which is way more usual I guess) but I managed to get 40k in PF and over 3k7 in AS which goes to show how insane this the synergies between the three really is.
