Hey there,
As you already know by grouping 25 ppl from your realm you can loot items from the boss if all of your group has already killed the boss once. (with this you don't need animore 25 ppl who already killed bosses once in the week)
But this is possible only if all your group is agree to bug abuse.
So here you can loot again and again without 25 persons agree to bug abuse with you and.
All you need :
25 ppl who you don't know from your server.
Raid lead.
Master loot.
How to in 6 steps :
1 : group 25 PPL from your server (you must tell NO NINJA when you'r grouping, introduce the master loot).
2 : Queue in LFR
3 : Request back the raid leading in the raid.
4 : Put master loot ON
5 : Kill a boss
6 : you are able to loot items. (so don't ninja, ask for rand)
* : IF ONE PPL LEAVE YOU MUST NOT QUEUE FOR FIND AN OTHER ONE, cause if he isn't from you realm the masterloot will be replaced by Grouploot mode !!!
With master loot you have a chance to loot your items on each boss. If you repeat this more than once a weak group with alt, cause if ppl see you grouping 25 times a week you'll looks weird.
Difference between the old method and mine :
People don't know you and they don't know that you have already kill bosses this week.
You'r not involving your guildmates.
Sorry for my poor english.