I recently leveled my ele (first char) to 80 and Lightning hammer is by far the easiest. As soon as you get enough skill points to pick up this conjure, respec into Conjurer and you’re set.
For melee mob groups, gather up a bunch while strafing, hitting two autoattacks. As soon as your third autoattack (the one that blinds) is ready, step into the center of the group and blind them all. Now you can afk until they’re all dead. For ranged, either run to the ranged mob or LOS around a tree/object.
The real benefit is that as a conjure it scales in damage to your level, so you don’t need to waste time/money keeping your weapon up to date every 5-10 levels.
Second option to this is to run the two glyph of elementals with the glyph CD traited. Alternate summoning them and you should have a pretty high uptime tank.