about mob types:
i assume u know that the game plays quite differently, once you got lvl 70 and a 6piece class set. everything "below" is really just for fun and everybody should do what he wants. as for T13 and GR60+ (before the patch around GR85 was a soft limit for most, except you got rly deep and rat runs and stuff); now i would say if you push it enough almost every 6p set will get you at least to GR90.
anyway, what matters is only the affixes of the elites, the rest of the mobs are called trash. builds are either trash killers or elite hunters in most cases. if you are a melee class you want to avoid things like arcane enchantment and mortars are deadly for ranged classes. you will notice when you are at this point however.
you got 1100paragons in S16 but not higher than 70? i got like 850 and cracked 102 solo recently, how did you get those paragons? there should be plenty builds which you could probably push that. DH solo are pretty strong with their dps builds solo.