the problem is not that its straining but that kkddkdk/kkdkddk is pretty uncommon in onis and not a simple 7plet pattern for oni players to read. just remove the sv so its easier to read?
ok i hear them now
i think the piano is best shown if the doublets end on them?
still think its a bit weird since you intentionally dont map 2 sounds
if you want to avoid mapping the offbeat/red tick snare, what about a rhythm like (cursor at 00:52:335 - ) 
if you follow a mixed rhythm and dont want to map red ticks, i think it would make more sense to map white ticks where there is drum plus vocal?
00:29:076 - OR 00:30:424 - OR 00:31:099 - (either, to avoid multiple triplets in calm part)
remove 00:29:750 -
more consistent with 00:35:818 -
can also remove ```花丸晴琉 花丸はれる hareru hanamaru``` , i think these came together with ```Dios/シグナルP``` (mix) from another cover (https://osu.ppy.sh/beatmapsets/1065445#taiko/2231088, https://www.youtube.com/watch?v=eBBOeYGqTvo) and has nothing to do with this version