Well…here’s my own opinion:
Overall, T-rex got best damage output, because it got that 2x rampage, neither I or Allo have this move, we only got 1.5x.
Due to you’ll need a bunch of T-rex DNA for fusing, most of them will stuck in lv15 or 20.
Allo got highest health, and also the most common in all of us. That means it will be easier to over-level. A high lv Allo could be a fine anti-tank.
(I mean, over lv20)
Critical chance is my speciality. So based on some RNG mechanism, if you are lucky, I could generate better damage than Allo, which could surprise your opponent.
But Allo is comparatively more common, because he’s nest spawn for restaurant.
I am local spawn + park spawn, that means somehow harder to collect DNA.
That’s why you can see more Allo than me.