A/N: Hey, so upon looking into these two series, which I haven't done deeply before, and I just realized that these two characters are beyond my capability. Not only are these two have immeasurable upper limits, but it's hard to keep track of everything given how many abilities there are for these two.
But, because I don't want to have this feel like a complete waste of time for myself, I'll just give a brief rundown. Rimuru has pretty much infinite destructive capability and has universal speeds, compared to Ainz's 50 kilotons and supersonic speeds. And considering Gown's upper limits are unknown, I can't accurately guess how much Ainz's reality warping can compensate. As for skill and experience, I'd say that they're equally skilled in casting magic, but possess different kinds of experience. Ainz has been lording longer than Rimuru, but Rimuru has experienced much more dangerous threats than Gown. As for powers, Ainz has greater versatility with hundreds of spells, but Rimuru has greater potent powers that influence the laws of his respective world.
Forgive me for foreshadowing a battle I couldn't deliver. As for the other battles I've made before, what do you think of what I've written so far? I've been working really hard on trying to make these believable and fun. Please tell me what you think.