Eradica

Does anyone know if she's actually top tier? It's hard for me to tell, because she's LR 1 and going against LR 5 Rachel's with higher optimization levels/gear. At even ranks, can she tank at least one blitzed ult from Rachel's ult if everything was equal? I'm looking for a final team to know who to invest in. Currently I float between rank 5-12 in arena, and about 15ish in team arena. Does the US version skills translate accurately to the KR version or have they changed them like how Destiny Child did?