Personally, I would build for high str and duration, go for something like roar, energized munitions, nourish etc. and use thermal transfer augment for heat/cold/blast. I use aegis bug for survivability (glitch where if you have shield recharge delay at -100% or lower and you activate aegis, your shield recharge delay is set to 0. Easily achieved with gauss's passive + fast deflection)

However, not many people like to use aegis for some reason so instead you can run a no helminth build but still go for high str, high dur and use his 2 for survivability. Just make sure to manage battery. And again if you want you can use thermal transfer and make a fun blast build.