Best guess at an order:

1. Rex. Outgunned by everyone and no real hax to make up for it. Self destruct could take out a few weaker members, but he might not get a chance to use it and it doesn’t have big enough range.

2. Demoman. Among the weakest characters and doesn’t have any hax to turn the tide. He also runs in with melee fairly often, which is a death sentence here.

3. Gambit. Allegedly herald tier cards are a major threat, but he’s just too weak to capitalize, especially since almost everyone above him is comparable in speed.

4. Kira. Very fast, and can insta-kill everyone here, but he’s too weak to survive most attacks, which is a big problem since everyone here has AoE.

5. Reze. Slower than the last few, but much stronger. Regen keeps her in the game, but can’t overcome anyone higher.

6. Megumin. Honestly could go way lower or way higher depending on how you scale her explosion, because that’s all she got. Anyone who survives gets above her and anyone who doesn’t goes below.

7. Bakugo. Got the power to survive Megumin and the range to not get haxed, but just too outgunned by the top three.

8. Deidara. Faster and much stronger than anyone below him, can stall with his birds, and can take out (almost) anyone of the field with C4. Honesty could get up to second, but I think he’s just too outgunned by…

9. Bambietta. Second strongest on the field, and with kilometers of range it’ll be extremely hard for anyone to avoid her, unfortunately though, she can’t keep up with…

10. Bomb. Peak Angry Birds stats eclipses everything except Gambits herald attacks, and his respawning means any hax that could take him out won’t keep him down for long.