3:19 drain per diff and unless you want to, you shouldn't mod the whole set because that's a lot so maybe total drain 9:57? (3 diffs) If that seems like too much too 2 diffs is totally cool! I bolded the lower diffs because they, in my opinion, need the most work, but choose whichever!
Your time must be limited, lucky my map has low drain time, it's about 3:42 for 4 difficulties. (0:56 each.)
https://osu.ppy.sh/beatmapsets/961162#osu/2012192 And, if you can, just tell me if the taiko diff sucks or not.
Thank you :3