I just checked the Wiki because I could not remember any variants beside the Atlas M&C that were actually combining NARC and PPCs, and acording to the Wiki there are none.
So this disussion is kinda... nonsensical.
To add something on topic:
I would not care if any variants had both on them, I play pretty much any NARC capable mech the same way.
I pick the target I want to shoot at before entering combat, most likely something medium or heavy already fighting and damaged. Then I rush in, dump all my other weaponfire into him, dumbfire a NARC into the biggest other target I see (using my eyes, not my radar), dump another reload of conventional weapons into my first target, and then GTFO. Works well in a Raven and works in a Loki.
That has several advantages.
- The NARCed target does not gain any advance warning in form of damage. ("hey, that little raven with the huge NARC on its side just shot me, maybe it NARCed me, too, better head for cover")
- The mech I actually attack might freak out, thinking I NARCed him, too. (Don't laugh, I have actually seen people abort combat and head for cover after noticing that I am concentrating my weapons on them, most likely thinking I have also dumped a NARC onto them)
- I am not wasting reload time/heat/ammo on a target that will be out of the fight anyways soon. I only NARC if I know that we have a good amount of missile artillery waiting for a target, and that means that anything I NARC will soon be engulfed in almost a hundred (E)LRMs and/or half a dozen Arrows.
By the time the NARC runs out of energy the target will be out of the fight, one way or the other.