Farmed the power rangers last night for 1 hour on Normal MM3, if you take the route shown by K6 on his YouTube video explaining the rare spawn week event, you can hit 3 white chests as well as fighting the power rangers themselves for the drop. First chest is on ground level prior to jumping up to top level, 2nd chest is right at the spawn point of the rangers and the 3rd chest is right below the stairs to the 3rd level. Running this method last night for 1 hour always netted atleast 1 legendary per run, sometimes as many as 3. Got a total of 3 legendary class mods from the rangers (which compared to my experience with Agonizer and Katagawa Jr last week is way more dependable) and a ton of weapon and shield legendaries from the chests and rangers as well. This is going to be my grind method until I get every legendary class mod for all classes ( hopefully) and then I think I will be moving on to Red Jabber for legendary grenades.
I sadly have farmed them over 25 times on varying mayhem levels in true vault Hunter mode and still no legendary drop from a single one of them. I got a bunch from the chest right there but I’m wondering if there is a change in drop rate or some kind of nerf for them. I have tried 5 others in mayhem one and got them all in less than ten tries.
They were dropping for me yesterday reasonably well. Today I could not get a single drop from them in at least 20 kills.
i have done force troopers maybe 20 times on TVHM M3 and i have a +11 luck thingy.
[edit* so the droprate is that frickin low?]
not one classmod… just got a legendary.
i have been idling in the lobby. even did a verify game data.
any help here would be very appreciated 
tip! you can jump up at the left corner of that ledge/wall