This build gives you decent speed and 60 rounds typically lasts me 80% of the match depending on how careful you're placing your shots. I chose 2x MLas instead of 4x MLas as the extra 20 rounds of Gauss ammo is more important. Full armour everywhere with half armour for the head and legs. You're a long range mech so legs will often be behind hills and if you get legged you can still shoot at all your long range targets. Gauss ammo is in the arms but you could move 20 rounds into the legs as backup in case you are worried about losing ammo when an arm is blown off. No min range and a 42 damage alpha strike lets this mech works wonders at all ranges. The XL255 engine lets you peg the lights that pass in your front arc.
The leg armor for me is too low, that's an alpha from a light. I prefer the classic XL255, 7T, more armor.