Did Zader stop working for Heroic Rancor?

No double tag tm reduction from vader being sith/empire and ep as well tfp got fixed also.

I've tried multiple times in this being our second HR, and every time our zader guildies are going in we're getting streaks of 6 to 7 hits with no TM reduction. All empire or sith with greater than 50% potency

Something is still very broken with Zader rancor teams. First phase you enter will always be very difficult and TM reduction rarely does anything. Second phase is easier, and by the 3rd phase, it's gravy. If you skip P1 and enter in P2 or P3, it is even much worse. Phases 2-4 do NOT act the same if you start in Phase 1 or a later phase. This needs further attention as it is very much broken.

TFP tenacity down will help you. Our guild has now a bunch of people doing it, after the "bug" fix.
Common team is Zader, Rex, QGJ, TFP and Tarkin. (This last one can be a sith/empire too).
Runs on auto from P2 and clears it in minutes on x4.

It worked ok for me tonight first time I've done it though

Potency has nothing to do with it...zader gives a 50% chance for 25% tm reduction with NO RESIST. So that potency is just wasted mod space.

This isn't from personal experience (yet), but it wouldn't be a waste to have high potency on Zader with his DOT from Force Crush. You can stack the crap out of them and they are permanent as long as Zader and the target(s) are alive.

Here is one example: https://www.youtube.com/watch?v=hzD10j6KqFg

Refer to time stamp 4:05 in the video.

phase one TMR works as expected, phase 2 it is doubled (removes 40%), phase 3 it is tripled (Removes 60%) phase 4 it is 80%.

Tenacity down doesn't matter at all for empire toons because zader's leader makes TMR unresistable. so the goal is to just hold on to your hats and pray to make it through P1 and 2, and by 3 you can auto basics only through the end.