Grinding 10☆ and Higher

[Vampy]

I tend to wait until I have a stack of like 100 grind protects +1. Saves money most my money used to disappear from the buying of protection. As zipzo said the key is having a lot of money. In short bursts can sometimes be more expensive then saving up the money grinders and protection and grinding to level3 +10 in one sitting.

[LotusFX]

1.5m for +10 and level 2 potential isn't bad. Mine was way worse. Most of the time it would get to +9 then drop to +1 which makes me want to punch Dudu on my screen.

[Ordy]

Here are some numbers about my 11* grinding:

Bio Triner [XQ Rifle]

144 x Grind Risk Reduction (+1) (45,000) = 6,480,000
26 x Grind Success Rate +5% (65,000) = 1,690,000
17 x Photon Sphere (68,000) = 1,156,000
190 x Grinding (14,625) = 2,778,750
---------------------------------------------------------------------------
Grand Total : 12,104,750

Grind chart:

Spoiler!