I just stopped raid leading, but to compare, that boss took us 3 wipes. (2 nights/week)
Your dps seems to be behind. Gear can cause this tho (Gear is HUGE this expo)
http://www.worldoflogs.com/reports/r...?s=2853&e=3279
Gearing up takes time, and if you got into this tier late, you will struggle on some bosses.
However:
In general, as a raid leader you can "carry" your raid team, if your really serious about reading tactics.
And besides your members upping their performance, thats about the only thing you can do, if you don't wanna replace people.
Reading ALOT up on bosses can be tough, but will give you an edge over other guilds, with tips / tricks your combo can abuse.
For Blade Lord, it seems like you have tons of things to improve on.
1. Cd management.
2. 3 heal if your dps can manage.
3. Taking slipstreams @ 12 % with tanks staying to get it down (+dots).
HoP crucial Bleeds. (If the guy guy target by unseen strike have bleed buff).