Your way to do phase 1 is.... weird but it works I guess lol. It doesn't really favor you to be honest. You would gain DPS being on your own and not moving unless you get the marker.
1- In regular T9, everything Nael jumps on me and uses Chariot, I counter it with Manawall and if I have a proc, I Aetherial Manipulation for the beam otherwise it doesn't deal enough damage for you to move (Unless you have an healing issue)
2- On golems, always thunder all mobs, it's a DPS gain and you triple the chances of procs that I use on other golems so maximise the DoT damage.
3- On Ghost, it should always be close to Nael and since you don't LB you should be doing double flares. Save your swiftcast convert for that.
4- Raging Strike rotation --> Beginning, Start of Golem phase (if up, otherwise save it.), After first Heaven's fall, Second set of dives.
5- Potion rotation --> Beginning, After first Heaven's fall.