Can you list out the uniques you have? But personally, Lania would seem like a solid option though I’ve yet to face one in arena. It needs some Attack boosts on it though
O don’t know how well testa does now since i haven’t unlucked It, but i suspect lania is the better creature. Since you have more speedsters than tanks, i belive having a solid tank like lania is the better option. But rinex is amazing now, If you prefer a more hard hitting speed oriented team go for rinex, it’s faster now, got some resistances that complement It well and decent bulk for a high damage speedster.
I really hope rinex can inherit swap-in resilient strike.