Even though Halo 4 lets us have 5 loadouts, I've only ever needed 3.
- Frag Grenades
This was my default loadout, the one I'd pick for anything that didn't involve extreme circumstances (such as the long range fights in Ragnarok.) The Carbine has always been a favorite of mine, and the Boltshot was a good compliment to it. Frags are the most versatile grenades since they can bounce around corners, and I picked Resupply as grenades are important when you use a Carbine. Against BR users (pretty much everyone) you need all the edge you can get.
I used to use Promethean Vision, but I felt like I was too dependent on it. I traded it for Hologram and Stealth as a hard counter to players who use Promethean Vision. Stealth stopped them from detecting me, but the Hologram still appeared red through walls, drawing enemies toward them. Even without that, the potential for misdirection with Hologram is fantastic.
- Frag Grenades
- Active Camouflage
- AA Efficiency
This class is all about playing the range game; being able to snipe people from across the map. This is pretty much the only loadout I used in places like Ragnarok. The combination of the Lightrifle, Active Camo, and AA Efficiency is pretty straightforward. Take in the battlefield while invisible, and pick off targets running around in the open. Stability is a great help in winning gunfights, especially since the Lightrifle is really dependent on staying scoped in.
Sometimes I'd use Firepower and give myself an Assault Rifle, but the quick recharge from AA Efficiency is just too good to pass up. Besides, the magnum is decent enough. And sometimes I got to pick up someone else's automatic weapon instead.
- Any UNSC Weapon (not important)
- Plasma Grenades
- Regeneration Field
The whole point of this class was to pick up machine gun turrets and use them as primary weapons. The Gunner perk was a godsend since it lets you carry a turret with no speed penalty. Mobility helped me get to the turrets as soon as possible, and Regen Field helped my survivalability. Mowing down a bunch of players with a heavy machine gun usually garnered a lot of attention. I'd also pick plasma grenades since I'd typically use this class in BTB, where vehicles are common. I'd usually open with this class on any map with a turret, then switch to something else. But if I got a game on Pitfall, I'd often use this loadout the whole time.
It's been a long time since I've played Halo 4 on the 360. But recently, I've started playing it again thanks to the MCC. And after shaking off the rust, I've tweaked my loadouts. My General Purpose loadout has changed to a Promethean Loadout. It uses the Lightrifle,Suppressor (thanks to Firepower,) and a Pulse Grenade. The Lightrifle can compete in middle range as long as you get at least 1 scoped shot to hit. The rest can be unscoped bursts and you can still achieve a 4-shot kill. The Suppressor takes some getting used to, but it devastates up close, and because of that it suits my stealthy playstyle really well. Pulse Grenades are difficult to use, but their instant detonation can drain shields in a snap. They're a perfect pairing for the Suppressor. I still use the Stealth + Hologram with this loadout. When I use this combo I move while crouched to avoid tripping the radar, or to slip away from an encounter. It's the best stealth approach.
For my sniper class, I've changed a few things. I now use a DMR, Plasma Pistol, Plasma Grenades, and Awareness. So now it's slightly less powerful, but more versatile and suited to BTB. And my gunner class is exactly the same. I've thought about experimenting with a few more setups, like a class that uses Ordinance Priority and Requisition. I haven't gotten around to actually trying them, though.