archer with lvl 10 arrow shower > anything
No way, Magnum Break has a range of almost entire screen, you are invincible when casting it, will keep hitting as long as there are enemies in range(Try it out in Geffen tower in that section where Poison Spores fall down), and has silly SP cost, even with 1 INT you can use it in every section once or twice.
What do I mean by slow? Character movement is too slow for sections this big, the parts where you lose control(Like when boss shows up, or that Knight on Peco who appears throurough whole game), and the section ending where scoretable appears. All that seriously breaks the tempo.