I would love a Simulacrum buff.

[Nichivo]

I'm thinking some map choices. The option of an enclosed arena, or maybe even way to choose the layout.  I would also propose a level bump starting at MR 20. Instead of the 5 x MR + 30 just add a zero to MR 20+ . That would mean MR 20 could summon level 200, MR 27 level 270, Future MR 30 level 300. Level 165 is not high enough. IMO!  While we are at it a bump to number summoned, say 30-50 would be awesome.