Mjā, scalpel outranges moderators. Firewalker sounds nice but if bolas get close it it just suck. Placeholder seems limited use. Jugglenaut seems only unit which can do anything vs bolas protecting firewalker. Sound like great unit combo which need too much microing.
So seems only rational way is to counter such combo with constable building another factory.
Bolas + lance is already death sentence for many factory.

I got rekt by group of pyro when using bolas + scalpel. Pyro jumps in, scalpel missiles all miss the air target, pyro DPS is crazy up close and everything gets rekt.

6 pyro vs 3 bolas + 3 scalpel should go all the way of the pyro. I expect it stops favoring pyro as numbers increase.

Moderator pyro might work.