Sorry for my late answer.
I was playing int bow in 2013-2014 on official Silkroad.
I played 2 different Int Bowers.
One with cold / light (4/1 mix) (for the must piercing flow) +16% magical damage.
He is stronger in grinding, but lesser effective in pvp.
And one pure cold / fire.
He is pretty Strong in pvp, because of the ice imbue. Fire/cold wall protect you from all europe classes.
Wizards are easy.
You can check this Video for some details, but it's a bad video (not mine). And the Int Bower didn't even try it.
The Magical damage on Weapons is this sword > Bow > Spear.
And with the Spirit ghost skills (lvl 30 bow skill) you deal more damage as a s/s nuker with nukes.
Than you have the increase range, increase hit ratio which makes you stronger as a s/s nuker.
Nukes need 3 seconds to cast, while your Bow skills need 2 seconds and less. and you can Crit.
I never use nukes while grinding