I cant remember complicated situations for which I'd need a constant follow during the fight. What I do is:

1. Find good position
2. Start fight (1 DPS key)
3. Press Space -> all
4. Press Follow -> all

The DPS key depends on the build. I have marksman / engineer hybrid build which is very easy to manage except for the Series of Shots. I once had 3 DPS keys:

- all attacks in an prio-order except for SoS
- SoS
- the non-resource costing default attack

I added alert.wav to the first 2 steps. After some seconds IsBoxer beeps the alerts which reminded me of switching to a different attack.

However now I switched to ~30s rotation for which I only need to spam one button. The rotation is not perfect and I may have 15% DPS loss compared to the perfect rotation and maybe 10% loss compared to a solo player.