I have three quick halo: reach questions?

Well, sadley I recently went to Memphis to visit my Sis. & Bro.-in-law but couldn't stay down there for very long, so I haven't gotten to know everything about my Bro.-in-law's Halo: Reach game yet, but as for my my fav. armor ability I would say it's the Hologram. You can send a hologram of yourself so enemies will attack it & not you, (well, that depends, like if there are a lot of foes around you'll likely be attacked by some, but the others will focus on the fake) so you can shoot 'em off guard. Oh, & before I forget I thought of a good strategy for the game, whether ya' know it or not. A wise plan is that whenever you're out of amo, since your CPU teammates can't be killed, you should let them take out a bunch of foes while you hide, so you can safely move in & swipe a weapon when you need when it's safe. Hope this helps. BYE!!!