Thanks!

You only need to cast the auras again if you die, otherwise their persist through relogs.

I don't think you can assign keys to movement, but yes just movement to keep them within range - which I think is a good amount at max level gems.

It looks like you should be able to push harder for less currency than a solo build, and be more tanky for boss content - the solo build might be quicker to dart around the maps, but if you're juicing hard then I think this will be a satisfying way to play - but yes will see ! About to enter act 5.. so only half way through campaign.