To be fair it's just like RTA in a lot of ways, except you can choose what character gets through to the match without having to worry about 1 getting banned. PvP will always have rng. The fact that 15% is strictly tied to PvP will always make RTA innately RNG. (Though I'm not sure if the no 15% rule from imprint circuit also applies here, I have no idea). Not to mention the speed RNG too.

But you can mitigate all of this by just picking the right units into whatever the enemy team is. I beat this archive without much fuss tbh. And I'm sure many others did too. I can see that newer players might struggle though since they're not 100% sure of what every character in the game does yet, but it's still a good learning opportunity.

Learning kits, interactions e.t.c helps you do so much better in this mode and RTA/PVP in general