Well, if you are using SRM4 you don't really need to go +A, so take that off and get ammo and/or more armor, whichever you prefer.
Heh, I never tested with vs without, I just slapped it on because I'm scared to get close to anything in a Dragon! XD I'll give it a go - half & half armour/ammo would be welcome.
Aha! I done did what you said, and this happened: (sorry for the wide screenshots, it's 872 dmg) Practically shoulder-to-shoulder with my buddy Air the whole match, yay buddy system! Also in this match, put many LBX shots into a Dire over cover - it was fixated on me, but couldn't hit me back due to hardpoint position. I wouldn't have been that liberal without the extra half ton of ammo. Ended up using all LBX & missile ammo. You're right, that artemis ton is better spent elsewhere.