Fly both your worms to the top using the jet packs then take out the top ones first.

Thats what i did. You can use th erope or float down for the others

I used the blowtorch to climb up the mountain from the inside since it's infinite and
there are holes to go between. Periodically, you come out of a side to knock off a couple
worms on the sides and go back into a hole. By the time you're in striking distance of
the top worms, the air strike should be ready. From a safe place, use the bunker buster
to weaken a group and then air strike them. Between the homing missile and super sheep,
the rest are easy.