i play hardcore, so i generally only use spirit until i find a stormshield or gerkes (slightly less str and les dex for max block) but doesn’t have the same DR but has different types (that work better with ES) so if you’re going with a ES build Gerkes would be a good swap if you find one.
the 156 str isn’t too much especially if you can find some nice str rings / ammy / tgods for lit absorb…
non ladder u should avoid single element, unless if u have sundercharm if it available to NL. i suggest dual element blizz +lighting/chain lighitng ofcource not efficient in p8, should fine/ok for 1p.
str 158 yes, so far the best shield is spirit, unless u have enigma.
Wrong. Use light sorc with an infinity OR stick to the areas that your damage type can actually handle. There is no use in diluting your damage to be able to farm everything it is a waste.
with infinity you can build lighting, in my case the player not there yet, offcourse you can stick with 1 elment, & locked to the same map, repeat 30-90 days. or skip mob that immune, its a choice
There are multiple things you can farm. If you choose to only load one map that is on you. But sure, you can multi spec, be slow at 2 different elements, so that you can farm a couple more areas super slowly. Or, you can stay in your lane, and farm what you can until you have the gear that allows you to farm elsewhere. That would be like an uber smiter, trying to farm cows wondering why he doesn’t find anything all day even though it takes him an hour to clear cows.