Where to put skill points on grenades?

[Twisted]

So it looks like you add more to the passive skills.

I don't see alot of situations where one would use grenades to fend off enemies(as other weapons help more, or get quicker hits to kill) so that was kinda my question about either adding the points, or just leaving them.

Might be just me, but I spent alot of time lvling in the same place. Mastered pistol and grenades there(Tormenta). Taking advantage of a glitch I guess, but why not when grenades are so hard to level. Using hex shots on molusks at first to drop voodoo and getting 100 for each. Sometimes the seabeards would get in, but not too hard to kill them off using no tonics. You can only sit on kingshead so long before getting +4 for each in the group! LOL

Keep the help coming, I would like more ideas.

Like I said before, my grenades are mastered so I would like to know if I really even need to add points to anything...