Rock lobsters or water fiends?

I have 83 magic, 81 defence, 88 strength, 88 attack, and 87 HP. Should I use ancients at rock lobsters, or melee waterfiends for crimson charms? I need enough to get me 65-67 summoning.

 

Waterfiends as it's only for 2 levels.
If it was for a higher Summoning level and you had money to spare then Rock Lobsters for sure.
Rock Lobs are beast charms/magic exp/fast if you have the money.
Good Luck

 

Mmk. Balmung, v flail, or sara sword?

 

sara sword.