Skill Haste is a waste on a Turret/Drone build. The Drone cooldown is already very small and more than covered by Empress. The Turret can be picked up to refund cooldown. And especially if you're using Capacitor, you should take full advantage of being able to do both Skill damage AND bullet damage. To that end, what you should be doing instead is:
TECHNICIAN:
3pc Empress
1pc Belstone
1pc Wyvern
Either Waveform exotic holster or Memento exotic backpack.
You don't really need skill haste, as I've said before. So what you actually want is for every single piece to have Skill Damage and either Critical Hit Chance or Critical Hit Damage, ideally with at least 60% CHC total. Recalibration will help you A LOT here.
Ideally what you want are pieces that look like this:
https://i.imgur.com/rbqOLwu.png
And every single mod slot on your chest/back/mask should have either CHC or CHD to push things even further. Everything is in service of maximizing the synergy between Capacitor and skills. The only tricky part of the gearing process is finding a chest and backpack that has the right secondary attributes with the right talents. Fortunately there are a LOT of talents that work well with this build:
BACKPACK:
Combined Arms Very good when combined with
Spark.
Tech Support Added skill damage, but your turret/drone has to get the kill instead of shooting.
Companion Good because you're usually posted up in cover next to your turret.
Composure Good since most of your time should be spent in cover anyway.
Vigilance Most of the time you're in cover and enemies are shooting your drone/turret instead of you.
Memento Best choice all around for everything: Weapon Damage/Survivability/Skill damage.
CHEST:
Overwatch Very good team talent, since it's a bonus for you and your allies.
Kinetic Mementum Best in slot for skill damage.
Unbreakable Does nothing for your damage. Pure survivability.
Glass Cannon Risky, but adds top damage for weapon and skills.
Obliterate Pure weapon damage, and needs that 60% CHC
Spark Excellent in general, but even better when combined with
Combined Arms
If you're using Memento this is a pretty simple loop: Drop turret, deploy drone, shoot capacitor to build stacks, pick up trophies after everything is dead. With Waveform it's only a little different because you have to find a backpack talent. But the gameplay is pretty similar.
Personally I'm not a fan of the Rigger set, but the numbers are pretty similar as far as skill damage calculations. Where it falls off is in the weapon damage category. It's not a bad place to start for gear farming since sets are MUCH easier to collect, but eventually you want to be using a high-end set so you can get that skill damage AND critical damage.