I tested it already at 140 ~para 2k mostly non-augmented gear and a few non-ancients - after not playing it for a year or two (since S28). While it feels a bit squishy, I’m sure it’s 150 capable by even me at a little higher paragon and full augments. Doesn’t work if just standing still and tanking everything, and for low para it needs more skill than I have. Also might need minor fishing so that mobs are not the absolute worst.
S28 I did an easy 150 after I got used to the build, but naturally then the altar provided more toughness. It has toughness from the set, Karini and Guardian set - this is enough.
And while people say hydra wiz is in trouble if shields drop - that’s not exactly true. With season having passability, it’s possible to just spend next 5-10 sec outside the biggest group and regain the full shields with the help of barrier blades, then return trying to deal max dmg at close distance.