At what range level is it worth doing Pest Control

At 48 ranged atm, so at what range lvl is it worth getting pc points?

 

Are you a ranged pure, or do you have melee-based stats as well?

 

at the moment im a range pure, just doing ranged so far, combat 34 atm.

but planning to get melee as well

 

I'd do rock crabs until about 50 range or 60 range and then go do PC if you really want.

Rock Crabs are great XP for range pures using knives though.

 

at wat range level can I do tzhaar using safespots?

 

Any range level - it's just a hassle when you have lower range.

Like I said, 50+ range is ideal to reduce time spent on each NPC.

 

You can't go to PC until level 40 or so I believe. So it isn't really an option for you yet.

Just use knives at ogres (no drops), Minotaurs (ess), Druids (not as fast but decent loot), or as suggested previously Rock Crabs.