If you had 3 targets, and you used Internal Release (blood for blood and raging strikes are opinion here of course), you would have 6 DOT spells targeting 3 different things, over 3 seconds, as well as a ruin from you and about 2 attacks from your summon, that means that you would have an average of 7 spells that could crit every second, with a crit of 24%* that means that would crit each second probably about twice, in theory of course.

Question 3, is this viable do you think? If not, why please.

Why only 1000 characters? So short.