My Halo 4 plan

Campaign solo NORMAL in 1 run to get all the campaign unique items to get a start off

multi player
use my ordinance sparingly to steal fresh enemy ordinance in mass to push the opposing team advantage down to 0
play smart
-put in a few shots to assit players from distance
-in small maps creep around a corner to fool player into going against 1 rather than 2.
note if they got PV then we can simply charge them end of story lol
-distract players into spamming grenades to thrust out causing lose of their noob play
-shepherd players to portions of the map that can get team advancment, which will lead players into predictable positions to fight or that they use ordinance and over run them

play with my group for our standard 50 and whatever wins sometimes 50-0 or 50-30

now let me just throw out a strategy for you guys like I will use with my team

study map location spawning even if its vast

speed boost all player
forerunner shotty or rockets
massive spread cover portions of a small or medium map giving even more coverage due to the speed boost and add in the Pvision. To ensure spawn trapping to a high degree
postponing the enemy ordinance until the heat session runs down and the get kills again by which point we already have a set up to use new guns or Oversheilds to overrun enemy ordinance drops to claim ourselves.
though rather than spamming this I would take my time to study and get the items to then set it up to roll. until I learn everything about the map at least >XP