First of all, I dont think that this is a huge issue, but I do believe that this will be a really nice quality of life change for everyone. If the potion stack limit could just be increased to even 300, it would save a lot of Use inventory space. As stacks of 100 or 150 can start to flood your inventory SUPER quickly.
I'm a f/p mage, using mp and hp pots from nlc and at all high level spots, I need to pop a potion per hit, as well as 1 mana pot per use of meteor, so I probably buy more pots than the typical player. Half of my inventory are pots while 25% are misc. items like tp scrolls, all cures, pet food, and a few scrolls. Like I said, this isn't big issue, just a quality of life feature. I figured something like increasing pot stack limit isn't too hard to do (Im just assuming, I have no idea what it takes to do this) so I may as well suggest it if others haven't in the past.
I have a Fire Poison mage too, I know the issue you are currently facing, because of certain class traits that you need store more potions than a Bishop. You can try consider using % potions like Ginger Ale, I would also want to let you know that resource management is part of the game. Have too many items in your inventory that you want to keep? Just keep them with your local storage NPCs or create a brand new character solely for trading and storing items.
Id wouldn't like to see we get 500 or more potions slots :\ i think its a QoL update, yes.. but resembles TOO MUCH for a "ezpz private server" feel.. that everyone have 1000pots or item per slot. I would prefer to not see it ingame.