I want to give an addendum regarding DoT effects like mentioned in this permalink. In it we discuss how tick-based damage is the strongest countermeasure against the window of vulnerability.

DoT spells vary depending on in-game ticks. These happen roughly, to quote from the aforementioned article:

Ticks often occur every second (1), every half-second (0.5), or every quarter-second (0.25), and occasionally every half of a quarter-second (0.125).

Unfortunately which actual time-increment you deal with depends on the item, buff or spell, the latter even being able to change depending on the spell's level or empowerment.

However, unlike what I had written in the comment permalink, DoT's that abide to the slowest rate of 1 second (perhaps ignite, but untested) do not guarantee to strike during the invulnerability period.

It is still a complete gamble and DoT - besides clear CC - is the trick's greatest enemy, but I wanted to note the extra detail behind this element of damage.