Not enough tanks queueing for Level 50/60 Dungeons and Roulette

[Synestra]

We already have Cracked Clusters for Leveling Roulette AiN, so how about a source of crafting/gathering grade V or VI materia in the 50/60 roulette?

That would make me tank 50/60 more often.

Now this something, not only i could get those myself it would also make them(hopefully)cheaper in market as well. It could be also "universal" cluster that can be used on both battle or land/hand materia.