[Poruku]

I'm honestly not very scared of a summoner that takes that long to get his damage stat running and then can't summon. It's akin in power to death knighting imo, which often means 50% more damage. I think 5 rounds is fine. Plus if you run out the 5 rounds you suddenly do presumably trash damage.

I can see it being scary in some setups, but not something I could ever see dominate the meta. At most it's a stat efficiency build with more damage than most people but dependent on a buff with opportunity cost.

It's fun! Hell, if it becomes meta? That's a new IC plot point baby, you're literally killing your youkai, you're a cruel tyrant, deal with the social and perhaps legal repercussions.