MP washing for mage: From what lvl to hit 18750 mp at lvl 121?

I'll be making a perm level 121 Bishop and I want to hit 18,750 mp at level 121 (30k mp with hb). From what level should I start washing? I can't seem to find any calculators for mage mp washing. I'm guessing I need to start at around level 50 but does anyone know the exact answer? Assuming I start out with 10 int at level 1 and max MaxMP Increase at level 12.

 

Nvm, worked it out.

 

Long story short, not possible for me. Only able to reach 16,503 mp by level 121. But do read on if you want more info.

Spoiler: Results

By level 121 I'd have 12,448 mp unwashed + INT gear + MW10. However, it's impossible for me with what I have now to get the remaining 6,302 mp from washing by level 121. From level 66, washing starts to become feasible with a measly 1 mp/wash or 5 mp gain/lvl.

Edit: Slight miscalculation, I did not account for the 5 minimum sp requirement in Mp recover to unlock Max MP increase.

If I start washing at level 66, I'd be able to get a max of extra 4,055 mp by level 121. It will cost 852.5k vote cash or 275 resets. RIP.

Technically I think it's possible with better INT gear for that extra little mp on level up, and equipping MP gear (damage not a priority here) like,
+ Tier 10 monster book ring (+500 mp)
+ Maple Shine Wand (+100 mp)
+ Dep Star (+100 mp)
+ Ellin Ring (+100 mp)
+ Lord Pirate Hat (+90 mp)
+ Leaf Earring (+50 mp)
+ Wizard Robe (+30 mp)
+ Toymaker Cape [60% scrolled for mp] (+85 mp)
Total MP from gear = 1,055 mp
4,055 + 1,055 = 5,110 mp
6,302 - 5110 = 1,192 mp left

Max MP at level 121 reaches 11,573 from factoring only base INT+maxmp increase skill, while INT gear and mw10 gives an end total of 12,448. That's a difference of 875 mp! I'm sure with better INT gear I'd probably be able to get closer, if not even reach the remaining 1,192 mp. I actually wanted to do this initially to save pots while levelling mules, sell low level leech, and farm event drops at low level/high spawn maps (Lvl 1 Genesis (2k mp cost) + 30k mp = 9 casts before I need to repot with mana bull). But this may be more trouble than it's worth lol

 

That wouldn't really work though for what I wanted because the map I intend to farm event drops the most is one of the Ninja Castle map with quite a high spawn + shield att/matt drops. There are Jonins in the map and I believe a lvl 1 Genesis can just barely 1 hit them 100% with a normal lukless build. But yea I know there are a lot flaws in my plan, unfortunately.

 

That's very helpful, thanks! Doing this gets me a little more than extra 2.2k mp But fyi, the calculator didn't take into account of Jonin's holy weakness so I just used Gallopera.