It's multiple stacks of astral seal. From my observations if two or more clerics cast Astral Seal then that is when we start seeing fram rate dropping. One Astral Seal seems OK but why risk it.
If I am not mistaken this companions give a +% bonus and not an actual bonus. So it won't show up on your status sheet. Example is the dragonborn gives you plus 5% power and crit. So if you have 1000 power and crit you get 50 more. Not sure if the incoming heal bonus works the same or not but if you have a 0 there then any…
I am running an iron vanguard sentinel gulid. Actually doing fairly decent. I usually run stun encounters front line surge and takedown with iron battle strike. Atwills threatting reach and sure strike. Running a deflection gulid. Trying to get close to 50% if possible.