Board Thread:General Chit-Chat/@comment-27649935-20160419021314/@comment-30008130-20161129045138

https://www.reddit.com/r/bravefrontier/comments/5fbbm4/bf_live_vol_30_special_1128/

Straight from Alim, "Using higher ★ units can improve chance of raising SP slightly". In the link above in the Alim Q&A section. Do either low energy or find a quest that consistently gives 3*s.

Its a 20% chance for each unit that you fuse (This info is on the wiki somewhere, go find it yourself), but I find that when you fuse in bulk, the rates are better. I consistently get 30+ sp when fusing 99 units.

I don't know why TsgBf suggested fusing 5-10 at a time that makes no sense, just fuse up to 99 units at once, saves time and effort, plus, if its not just me, then the sp you get will probably be more too.