*shrug* It's all RNG, really.
You might get both of them in your first week, or you could have luck like an ach whore friend of mine who has been after them for two years with no drop. Lol.
I personally got lucky and nabbed the offhand after three weeks, but now of course the MH will take a year to drop
I'm shooting to get it sometime in December so I can equip it on the 25th and say "merry christmas to me".
Also, I haven't really had any troubles with mother sharaz fight, if my groups wipe it is always at the shadow council, because I can't keep up with interrupting heals and the 85's that are usually talked into going on raids seem to have terrible dps and aren't smart enough to exchange interrupts with me. If you can get a handful of people and wind up pulling ~30-40k dps overall, it's no big deal.
Regardless, I would always make sure you ML on illidian, or even reserve the glaives. I've had plenty of friends QQ about now somebody ninja rolled their glaive
lmao. If you can't find people, then offer like a 2-5k pot that you will give to the highest roller *if* a glaive drops. Incentives always help.
If you keep at it, you'll get them
I would also reccomend playing with a set of non-daggers for sub, so that you won't be so out of a comfortable zone once you manage to snag both glaives.
Non-daggers (ShS hemo) is more control based due to better CP generation, the daggers just give more burst. I prefer non daggers anyway.. but I'll just throw that out there. It's fun stuff