The synergy cooldown in ESO is 20 seconds so if you had two Sorcs in a group you’d be able to maximise the Major Berserk uptime by having the Sorcs alternate the Storm Atronach Ultimate every 20 seconds, providing a 50% Major Berserk uptime.
On a Tank this might function in a similar way to the Necromancers Colossus and you could potentially combine using the Storm Atronach with the Saxhleel Champion gear set to provide both Major Berserk, Major Force and a full group synergy.
This works well with the other buffs a Sorcerer has to offer with Minor Prophecy, Minor Intellect & Endurance combined with their great self healing, sustain and defensive qualities.
It will not necessarily be essential for all groups but when you are setting up a group for Trials an additional Sorcerer could now be useful if other buffs and benefits are covered already, and this now gives Sorcerer Tanks a little more of an edge forward making them potentially one of the more useful Classes to have available!
Discuss this on The Tank Club Discord