Hey MC!!!!
For nades, I retrain them so that I have just one point on each of the types of grenade - and I put the rest on passive skills. That way, it takes more hits to kill the enemy and thus you get more rep.
If you have a healer, I would take your 44 to Tormenta (the bridge) on a quiet server and nade those guys - you get a lot of rep really fast - but you need a good healer. You can also stand in the lava in the catacombs (if that glitch still exists) and nade the boss and his buddies - lots of grenade rep that way also.
If you don't have a healer, I just haven't found anything better than Dark Hart for leveling grenades alone. The fact that there is a gun shop there makes it so convenient too. That will work well for your 32 and 33 also.
Just be sure you stop by the sword smith and retriain - put only one point on each nade, the rest on passives. Works for me
