MAD-X "Weapon X" (1xRG, 1xLGR, 2xERPPC, LFE300)

https://mwo.nav-alpha.com/mechlab?b=3362ccab_MAD-XS

WG1 2xERPPC
WG2 RG and LGR

20 and 50 (+16 splash) long ranged shots for limited exposure.

Hot, I prefer some of the more typical builds for more ammo and enough cool to keep up a better rate of fire.
But 70 is a very crippling opening shot at 900+ meters.