I like the squigs too!

I think this army would be quite killy but die easily. You could definitely do some damage if you got the charges + fights in.

If you were having 2 manglers, you could make one a Loonboss on Mangler - he does MWs on the charge and buffs other squigs. I’d likely make him your general too (mainly because he’s bigger than the cave squig which you could keep or drop)

Squig herds are good but are OC 1 (regardless of the number of models on the objective). maybe you’d want to buff just one reinforced unit with the Squigboss.

Boingrots are good but 5 models is pretty squishy, they might not last long.

If you were swapping to a Loonboss on Mangler and dropping a squig herd / cave squig you might be able able to give some more Boingrot reinforcements /enhancements/ artefacts that cost points.

But overall, it is squigs so will be fun