well if that mech is for heat counter you have a long way to go!
even without abomination you can make a good anti heat heat mech
for example a terror cry can replace abomination right now since you dont have it, it is lighter and does more dmg but, no heating or heating dmg combo without abomination
then CL cause is a must
2X supreme cannon can deal tons of dmg but you would be vulnerable at ranges 7-8 so maybe a supreme and deso would be fine
so in other words:
make a rocket king build changing the abomination for terror cry and put a CL in it, focus on heat and hp (maybe even add a heat res but only if you have the myth one) and then you should be set to go against other heat mechs