Keeping it short and simple. I raided with a guild, we went 72nd US in Firelands. We then fell apart for DS, but managed to finish the tier 76th US. IE we cleared up to H DW without the 5% buff, and got H DW to within 1%, but the day the buff went out we one shot him.
I've raided 10 and 25 man, and I don't care which as long as we're progressing.
Also - my progress only shows 2/6 HM HOF, but as I've progressed through every other tier in the game competitively excluding this one, I feel like that should be sufficient, I know all the fights, just haven't experienced them myself.