Leveling Speed of WL?

[Tyr4el]

How fast is the leveling of the WL?  I know Assassin and FM and others can kill very quickly and thus complete quests faster but how does WL stack up in leveling speed?  What about solo play?  How does the class fare in solo play?

[Whiteflashkevin]

In low levels warlock crushes enemies but one you go to high levels you will struggle. Its aoe is good for multiple enemies.