Alas 4 5max = 2 HU = 2 fastfold tables are the limit of my ability now. I need AHK scripts to go beyond that and even then I won't be confident as misclick probability will increase.
According to the above equality, I think plaaynde shouldn't be afraid to add a second Zoom table.
Of course there's some probability of simultaneous difficult spots, that's why bb/100 winrates are lower for multitablers, but hourly winrates are bigger. No one should be ashamed of stalling in such spots, everyone has the right to multitable and use time banks. If someone fires 'zzzz' at you, tell a casual lie, e.g. someone called you on Skype, or your favourite team scored, or the poker client lagged (I was in such a spot today, of course I didn't tell to the table that the lag was caused by a HUD starting up

- I was using it for the first time

).
I wonder how people play 6 tables on a consistent basis, it's wasting screen real estate, either play 4 on a laptop (HU/fastfold ideally) or learn to 9-table imho.