dude use whatever you want. figure out where you excel at, choose your role type, set up yourself with that role type's suitable weapons, and go in crucible and -blam!- people. for example: i prefer to be a support/ stealth operative, which means i like to hang back and take pot shots on the enemy to help my teammates that are outnumbered and taking a few kills in order to turn the tide around for my team. i also love to snipe and take out the most dangerous enemy to severely weaken the enemy's ability to do damage. so if you feel like you can survive in the gut of the fighting, where its bloody and up close, then go for it. if you prefer to run behind the enemy lines and flank them with a second team mate with maybe hand cannons and shotguns, then go for it. do what makes you happy. just suit yourself up for the map that your playing on. if its a big map, go long range and vis verse .