I have played all 5 classes on softcore to 100 and 12/12, tried multiple builds on them.
And I am working on third class on hardcore to 100 and 12/12 because I had nothing else to do.
I really enjoyed the permanent cataclsym doomslide druid. I just switched my rogue from rapid fire to heartseeker and I am enjoying that build too. But sure, Lightning Spear is the strongest class, although I can solo a tormented boss with all of them, so there is that too. But for hordes it is either LS Sorc or Bloodsurge necro for sure.