What is maximum possible potion count ?

[Ragnaman]

And which class scales best from a potion chugger ?
Also, is there a unique that automatically drinks a potion when you would die from a damage hit ?

I think you know where this is going.

[GOD OF WAR SANCHEZ]

there is no mageblood in this game, chill

[Psykrom]

Either way, if you get oneshot you won't be able to manually or auto chuck a potion either. AFAIK there is no auto chucking those spicy red bottles.
Dodge remains king, or you get an absorb ability like Sentinel and Mage has to facetank that one deadly hit.

I don't think there is a potion limit either, I have seen belts with +6 or something to potion slots and maybe some unique to add a few on certain gear enchantment slots.
There is also increased chance to find potions, which some builds utilize to trigger on potion drink effects.

[Ragnaman]

hmm, so which class has interesting drinking effects ?

[Psykrom]

Acolyte gets an experimental belt enchant (from exiled mage cages) which summons volatile zombies on potion use, also has some potion gimmicks in necromancer passive tree, if I remember correctly.

If you can get that experimental affix on a queen of the forest with legendary potential, you can enchant it in the last dungeon Temporal Sanctum.
You can call it GG then and play volatile zombie + sacrifice auto summon bomber (ring of putrecense).

Just know it's not super OP unless you get great legendary potential and the ring to autosummon, which is around level 62-65 if I remember correctly.

But early game you can super viably level necromancer with summon bone golem -> fire golem aura/damage and ivory twin (2 golems for even bigger AOE aura) + separate skills dread shade on one of them, or infernal shade with buffs specced on both.

You can also trigger infernal shade through volatile zombies on explosion, so you do not even need to manually cast it. There is also the node hunger for the bone golems, which gives you and them very good health sustain early on.

Finally, once you have the ring, volatile zombie has also a node to auto cast sacrifice on death, which enable the auto bombing cycle, if you have enough mana to sustain it.

[Ragnaman]

Sounds like a great alcoholic build.

[KillJoy]

I have a belt that can hold 16 potions. It's a unique, so if you look for unique belts at the merchant's guild you should be able to pick yours up, for a fee.