Been starting shield crush every league and tweaking it to fit the balance changes. This league I've settled with berserker cold convert. The build can start off very cheap (leadership's price version with dawnbreaker as a cheap decent armour shield), and scale very well with investment (omni version with Emperor's Vigilance/Seething Fury). I played a champ version last league that was super tanky (killed 4/7 ubers and I'm not super skilled so could probably have done more). Don't think Berserker will facetank quite as well but the increase in DPS should be very nice. Could potentially drop some damage for defenses too with some higher investment.

NOT a one button build, requires placing totems, pressing berserk at max rage, pressing vaal molten shell, (eldritch battery divine blessing hatred in high budget version).

PoB with tree/gear/skill sets for the leadership's price/omni version (no guard/berserk/vaal warchief ticked):

https://pastebin.com/e935DiPv