Positives of an I/L?

Oblivion mobs are changing to become weak to lightning and ice. And according to Hidden Street, only one mob is weak to fire, and another to ice.

And since CL is a mob skill, it does more DPS than paralyse in some cases, such as horntail or zakum's arms. Hitting two mobs brings cl's DPS to 170%, and three mobs up to 219%. I'm not saying one class is always stronger than the other, but there are situational differences which give one an advantage over the other.

On 3 mobs fire demon becomes better than CL, also I've heard that ultimates have pretty good DPS if there is more than 1 target