Collecting charms on pures?

[Slashed you]

Alright so i'm turning my pure into a prossy/turm pure. Anyway you need 41 sum. Anyone have any idea how many charms i'd need? What's the best way to get charms on a med level pure? (94 mage 85 range 85 strength 60 attack 52 prayer) Any advice would be helpful seeing as i've never done summoning on any account.

 

[Simple As...]

black demons/ rock lobsters

 

[KingCrackerJacks]

you can safespot waterfiends