Hey guys!

The only difference between these 2 mysteries is the debuff, +2 reduces enemies standard attack damage by 30% and Y reduces the mystery damage by 30%

So your choice will definitely depend on your enemy.

+2 is better for round 1-2 nuker teams but Y is better for long 5+ round fights due to the debuff stacking

+2 could bring you some decent bonus damage, Y if you definitely need that ignition

Y won't give you the extra standard attack but might be better for some Sword User mysteries

Generally I'd recommend +2

Y might be interesting for long battles, but generally +2 should be your go-to option

As you saw this ninja has a lot of options that depend on your enemies and teammates, so choose wisely. Anyhow they are all decent upgrades and make him stronger

Breakthrough priority:

Passive 1 > Passive 2, Mystery > Standard Attack > Chase

1. Earth Main

2. Fire Main

Round 1 damage potential, might be pretty fun to try

3. Fire Main 2

4. Water Main

Round 1 nukers

5. Water Main 2