Ask a Bowman Thread.

I'm still debating on blood builds. I wanna see how dedicated i am to this game before deciding that xD

Any ways... at what level would Inferno beat out arrow bomb on mobs of 4-6? Not including the stun factor, just raw damage.

And also, for end of 3rd job builds would 29 hawk, and 22 inferno be good to end with?

Maxed everything else, except thrust.

Well, Inferno is the most useful for specific things at 3 main levels.
If you don't want it, leave it at level 1 (Clearly not the case for you)
If you want it as a luring tool, level 16 (Range increases at level 16)
If you want it for damage, ideal is 25+ (Or maxed), although 21/22 still seems the most common these days (Since it's the most convenient)

You could always get a tad less hawk (27 or 25 hawk and 24/27 Inferno), or leave it at 22. Depending on whatever Masteria has in store, and how the mobs are when GMS gets Time Temple, it won't make much of a difference.