I raid <Black Lotus> for clear raids PoFear, PoHate. I've joined a few Federation raids on big targets (Vox, Inny, Draco/CT) so far. Can only really speak to my experience with <Black Lotus>. Big target raids too short for a manastone.
If you're interested in the Manastone, there is an open auction with no minimum:
https://www.project1999.com/forums/s...d.php?t=366513