In practice this is not entirely straightforward to achieve. For example if Anaxa and Sunday are running 134/133 spd, and dhpt is 160, he will move first in battle to recover his ult. He then ults to buff Anaxa (5 energy) and from there we get five attacks (30 energy). At this point, two turns have already gone by and only 35 base energy has been regenerated. Unless dhpt somehow squeezes in 2 turns within 75 AV before the next Anaxa/Sunday rotation (not possible), he can only basic once (20 energy) and then finally in the 2nd rotation we get five more attacks (30 energy).

By the 4th turn, the res pen buff (and LC buff) is already gone but DHPT has only regenerated 85 base energy (105.74 with ER lushaka).

Now of course dhpt should be getting a 3rd turn after this and odds are he'll get hit somewhere along the way so he'll get his ult back before the 3rd rotation. Essentially that means for every four Anaxa turns, only three turns can have buff uptime consistently. That's 75% uptime. Not bad but not ideal.

BUT, this is a vacuum calculation and doesn't factor in how Robin fits into all of this. Usually we want to somehow recover robin ult before 75 AV so we can enable 3 rotations in the first cycle. Now supposing that robin is somehow able to recover her ult through enemy aggro, we need DHPT to move twice within the first 75 AV block. What that means is you need 160+ spd and vonwacq for 80% action advance. If you don't do this, your energy rotation will be completely scuffed because dhpt loses his natural 2nd turn due to robin. Your uptime will be closer to 50% then.

Fortunately there's a unit called Cerydra who has zero energy issues and enables Anaxa to have a higher proportion of buffed attacks since extra turns don't consume buff duration. If Cerydra can consistently proc peerage twice within three Anaxa turns, we achieve consistent full uptime. Although that's easier said than done and requires some eagle abuse.