Eh.... I say go for a level 33 build at least. You will then be able to use 2x grapple hook, teleport, and charge attack.

Cheap, and level 30'ish eh?
Ok I recommend you farm level 27 or 28. There is good weapons that are cheap there: take the raptor and hoofs or if you insist, gladiator.

27 build:
zappy
medium yellow lazer
joyeuse
top machine gun
artillary


28 build
medium yellow lazer
double red watchguard
single barrel rocket launcher
artillary
neutron gun

those are the weapons, 3 of them are sidies, 2 are topies. get a energy and a heat module (lvl 24 and 22) a 8+ resist module, and a hp module <- this is used for raptor at level 27, for gladiator; swap the energy/heat modules for a multi heat/energy module and get another hp one.

for 28, take a 8+ resist module, a heat module, (level 27) a hp module, and a +35 rocket module for raptor, and same for gladiator.
These are cheap and powerful builds, I sent you a request, I can show you what they are capable of.
These are builds designed by: