Earth/Earth

I have leveled up a Earth/Earth Dom up to 40 during 2xp and it has been one of the most fun characters to play. I've made a perma dom mids build using ice mastery to get the S/L softcap because this toon plays in melee most of the time, but I'm wondering if there are any slotting tricks to powers that I may have missed.

For example, quicksand, should I slot it for slows or recharge to maximize its up time? How do procs work in earthquake or volcanic gases? I'm assuming they are both pseudo-pets.

Not looking for a build, I just have questions about some of the fairly unique powers.

If you're perma then you should have enough +rech to stack quicksand with itself. On my earth/fire I have it slotted for one recharge and the impeded swiftness proc because why not. Slotting for slow isn't terribly useful because everything is too busy being stunned, held, falling down or all of the above to run far anyway. I mostly use it for the big -def and to keep things in place just long enough for my other powers to lock them down harder.

And procs work in earthquake and volcanic gasses, depending on the proc. If it affects the enemies, it works just like you'd expect, so go ahead and throw that lockdown proc into volcanic gasses because it's hilarious. If it affects the caster, then yeah, the 'power' would be affected, so putting that +rech proc from forcefeedback into earthquake gives the earthquake a chance to get some +rech, which doesn't do much for you.

I went back and edited my build last night, moved some slots around and ended up with a little more recharge. The way I had quicksand slotted it was able to nearly 4 stack which was a total waste. Combining it with earthquake and sleet, I'm going to be nearly flooring defense anyways.

I'm using the lockdown +2 hold and achilles -resist where I can. Is it worth it to put damage proc's in earthquake or volcanic gases?