[360]Looking for Help doing The Taken War: Earth Quest

Hey all. i apologize if this is not the right format for this, still a bit of a newb. so i'll get right down to it. i'm having difficulty taken down the 2 Taken champions for this quest and am looking for some assistance. any help would be greatly appreciated. also I am more than willing to help anyone who helps me do any quest/raids or strikes they may need help with. i may not be the most uber geared in the game, but i'm a damn good shot and would be glad to help. if your willing pls leave me a msg on here or tag me in game. my GT is bigwill8505 again much appreciated.