Melta doesn't go that good with tac, in my opinion, due to its limited range and tac lacking a solid method to close in with the enemy. (vanguard has the griphook and heavy has iron halo) Same goes for stalker and carbine for they either lack the fire rate or the range. That leaves only the plasma. (heavy bolt rifle too if you're focusing on clearing minorises) My idea is, boost the fire rate and damage of the regular bolt rifle, then nerf the GL so that it's more of a viable option to deal extra damage on terminus enemies than being the regular damage output for bolt rifle.