You have Raven which applies Jinx to prevent crits (mostly from beasts). Plus it's a bird card, good against beasts, mechs and bugs.

Exactly!

Beast-Mech-Bugs are hard to deal with in 1v1 because they tend to crit quite often, plus the damage is amplified because of affinity. With 1 Acro my speed go from 40 to 48 outspeeding even dusk and mechs. With 2 I could outspeed non pure aquas but that's the end of it. The most common problem I encounter with this backline is that useful cards become scarce in the endgame. When I saved lots of energy I just hold on my Luna Absorbs because they will just come back to the deck if I use them. They are great in removing stuns though. :D