[Setting realistic goals!!]

is that with 0% boost?

[Where Do We Get Levels 6, 7, 8, 9 Dyes?]

use 1 crystal when trying to upgrade it, turns into powder when fails.

[+21 r99 dark bow 3SA or +19 r110 dark bow 3SA?]

i think the main issue is the Elcyum needed to upgrade +21.  If that's not a problem, then go for it.