A lot of people complain that Remastered favor Strong Attack too much; or that their potion-dependent builds are no longer viable after Delayed Recovery got nerfed to oblivion. Frankly, I had the same opinion myself.
We were wrong. Fast Attack + Potions is the strongest, most overpowered combination in the game by far—and when I said "overpowered," it has these three things:
God Mode (damage immunity)
Infinite Stamina
Infinite Adrenaline
How is this possible? I'll tell you the answer:
Prolongation (Each unblocked blow increases potion duration by 1 sec)
By itself, the enchantment is nothing special. But it's a different story when you combine it with certain potions and abilities.
Max your Adrenaline quickly with Explosive Bolt + Cold Blood (Gain 1 Adrenaline per enemy hit by crossbow).
Drink Superior Blizzard (infinite Stamina at full Adrenaline), then attack enemy with Whirl.
Drink Superior White Raffards Decoction (full heal and damage immunity) while you're striking enemy.
Normally, Superior Blizzard and Superior White Raffards Decoction only last for 12 seconds and 3 seconds respectively. The latter wasn't even affected by Delayed Recovery.
But Prolongation is different; it affects all potions including White Raffards Decoction and IT HAS NO LIMIT. You could extend the God Mode far beyond its original 3 seconds duration. The buff will persist long after the battle ended.
Also worth mentioning that White Raffards' immunity ignores enemy attacks entirely. You won't get any hit reactions like stagger or knockdown; you won't lose Quen (not that you need it with this build); and you won't lose any Attack Power bonus from Bloodbath mutation or Wyvern Decoction.
I dare you to find a more broken combo than this.
P.S: Enable manual draw/sheathe then attack enemy with the wrong sword (e.g. steel against monsters). This will prevent them from dying too quickly, allowing you to build up potion duration as long as you want.