Are the Tanker/Brute Earth Mastery changes current? The changes as written seem a bit egregious, but they also don't seem to match what's currently in beta?
Stalagmites is a tough one to balance, it's actually undertuned being only a 10% stun chance with low damage and low accuracy. I think whoever is doing the balance pass likely missed that it's only 10% chance (if that proposed end cost isn't a typo [it is a typo]). Put up against Ice Storm, which is pretty much exactly just the blaster power with double recharge and about 1/3 more end cost, Stalagmites is looking pretty weak.
Maybe something between photon grenade and how it is now? So like 75% accuracy, 19 end, 32s recharge, mag 3 stun 9.5s 30% chance, halve the damage.
What I'd like personally is keep the accuracy at 60%, ~19 end, 64s recharge, mag 2 stun 6s 100% chance, keep the damage the same. But there's not really precedence for reducing the mag of a mezz power to compensate for faster recharge (compared to the original controller power)? Either way I think giving it 100% accuracy is not in the spirit of this type of power, and doesn't really help it become more effective.
Quicksand should have the radius decreased or the recharge increased not both imo. I agree it's too much of a copy paste of the controller power. If the radius is decreased increasing the slow closer to controller levels should be considered. It's a bit of a lackluster power to begin with other than being an autohit -def.