Self-healing as a Sorcerer Tank is one of the big strong points. The Clannfear is a huge heal that scales on Max Health so when you have a pet active your Max Health is increased and your heal is huge. Your self-healing can be buffed up even more for almost free when you combine it with Restraining Prison. This skill provides Major Vitality which increases healing received by 16% and when you use it and then self-heal, your Clannfear heal is buffed and heals for more. This even works on boss fights, as long as the prison hits something, even if it doesn’t immobilise it still provides the buff and then it restores Magicka because you didn’t immobilise but still gives you the Major Vitality.
Sustain is good on a Sorcerer especially compared to other Classes. You want to build with high Magicka Recovery and then you simply use Dark Deal to convert Magicka into Stamina, this also gives you consistent Stamina over time also. The downside to this skill is that it has a channel time so it will drop your block for a second when you use it, so you do have to time it.
Sorcerer Tanks are really in their element in add pulls and trials like Cloudrest and Asylum Sanctorium Off Tanking because they have skills such as Ball of Lightning and Boundless Storm which means they can move around extremely quickly.
Sorcs have the option of Bound Aegis as a panic button, it only lasts for 5 seconds but if you time it with hard hitting mechanics it makes it very easy to survive since it gives you 40% block mitigation which is guaranteed to get you to the 90% block mitigation cap and then you have the addition of the Minor Resolve and Minor Protection to add on top of that.
You have two unique Sorcerer buffs with Minor Prophecy and Crystal Weapon so you will want to use a Sorc in a trial group usually. For 4-person content they are very simple and easy to play. They are pretty much the full package from a Tank perspective and useful if you are the only Sorcerer in a group. They are only really behind the Dragonknight and on a similar level to a Warden when it comes to optimisation.