Evan Skills by Type

Are we sure that the skill books are received at levels 10, 15, 20, etc., and not at

10 → 20 → 30 → 40 → 50 → 60 → 80 → 100 → 120 → 160 as Spadow reported?

Given some of the vids I've seen, it doesn't seem like any level 120ish Evans are using Dark Fog or the other 10th advancement skills...

These master levels actually make more sense, in terms of earning the actual skills (i.e. having enough skill points to spread around) as well as balance. 9th Master should be at 120, otherwise they'd be getting Maple Hero earlier than every other class, etc.

It also explains why fairly high leveled Evan are not shown to be using any Blaze despite its power up.