I figured this out a year or two ago as I farmed the turtles endlessly for Storm Fronts. Make the farm trivially easy for a Siren. Never saw anyone else post this, so I finally recorded it. Recorded in NVHM to focus on the technique and not the fighting.
Jump down, stop.
Run just past the edge of the metal grating you landed on, immediately backpedal.
One ninja will appear.
Phase lock and Kill it.
Wiat for Phase lock to regen.
Run past edge, backpedal.
Next ninja spawns.
Rinse and repeat.
Thanks! I will need to test this out when getting xp for leveling Maya from op8/lvl 72 to to op8/lvl 80 as i was thinking of where i would do this with Maya. Killing turtles i think will give 20K+ xp for each run and that’ll get Maya to lvl 80 in a few hours i think.
(Today, everything was fine in Opportunity and nothing bad happened.)
This type of method also works pretty well with Fastballs, for those classes without access to Phaselock.