Alternative weapon build for PT if you don't have access to Exodia Contagion for Zaws. Idea is only to use Heavy attack projectile for ranged attacks on shields. [Corrupt Charge] gives an automatic x2 inital combo which will double heavy attack damage and will also trigger [Gladiator Might]'s passive to give +20% CC. Combined with SS this should be an automatic x4 on heavy attack but I need to test it first.

If following other PT builds on profile you'll see that the only damage types not accounted for are toxin, viral, blast. I have viral on this build right now but [Killing Blow] or [Gladiator Might] is the flex for this build. [Amalgam Organ Shatter] covers one buff from each so it comes down to which you would rather have, more CD or additional heavy base damage + wind up. I personally lean to [Killing Blow] being the flex. Take out one and add a heat mod and then toxin + blast achieved.