No.
Forget flawless, I'm not going to touch that with solo anything. That Servitor is just...
The first damage phase, I did about a 10th of its health. Probably normal. The second one... Every Servitor just teleported every direction. And for a 10-second damage phase after a tedious setting up...
Just no. I'm not a fan of RNG damage phases that last 10 seconds. Even Ghosts of the Deep wasn't that awful.
I haven't even played the Sundered Doctrine dungeon before. If it's worse there, then I question the development paths that dungeons are taking.
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This is actually an easy 2-3 phase encounter solo but only if you've the right loadout. Behemoth titan works wonders, always a consistent solo 2 phase. Else, use area damage weapons and supers. Tether works great, so does nova bomb. Wardcliff coil, colony, grenade launchers, etc. also work well. Consecration also works well. If you're using single damage weapons, it'll likely take 10 phases if not more.