The base idea behind is imho - make a one skill DoT build. That there are some hurdles (and CR will not be the most favourite area for such a build), well, yepp, but so what.
The idea would still be, SS the area / enemies - apply your DoT to them (more AoE needed) - retreat (e.g. with a disengage rune) - wait (kite) - repeat. If it can work without filler attack and the substain provided by them - well, not sure, but it would be surely (playwise) a different nuke strike attacker than blitz attackers. If everybody will like such a gameplay, surely not (I surely don’t like to wait for cooldowns) - but it would have its own unique character