I have been playing around with EFT in regards to Dominix and how best to set it up - it will be for running level 4 missions with the support or supporting another BS. As it stands with my skills (above average for shield and armour tanking) it appears the best option for me would be to have a passive shield fit to warp in 1st get aggro drop drones with the 2nd BS coming in behind with minimal tank to apply all the DPS. Conversely, when I look at doing an active armour tank it would appear I can get more out of my drones but at a drastically reduced tank - albeit with a much greater buffer so it would be prudent for the domi to arrive second on the scene. Context the other BS would in the main be Amarr.
So background out of the way is it really as the figures say:
Is a passive shield tanked Domi that much tougher than an armour tanked one or are first appearances deceptive? Does the ability to use the mids in the armour tanked one really overcome this? Which one is really the best for level 4s.
Out of further interest would the navy dom then make you give a different answer?

Also what kind of NPCs will you be fighting… this will greatly affect the outcome.
I’ve heard of passive shield Myrmidons, but never Domis… I think you might have to reveal more details around your potential fits.