Roublard/Rogue spell levelling help

Hi!

So I got a Roublard lvl 190 and I am struggling with what spells to level. I have kamas for about 10 spell scrolls but that feels like nothing considering all the spells that are useful to position bombs.

If I were to prioritize is there any guide or master roublard that can guide me on what spells I must level first which ones to 6 which ones to 5? It would really help a lot, thanks!!!