The Tranq Shot list for mage and other class was there but dispel too much result in a low dps so it's removed.
As Tranq Shot use cost focus and GCD and do no damage.
Removing alter prevents a large amount of damage if you can get it. but I can see your point as it may not be the most important. But dispelling temporal shield prevents their self heal, I think that is damage in itself. Meh if you don't think it's a good idea I can just manually do it.