Alchemist has 12 nights worth of abilities. I think the number of uses should be decreased by 1 for each ability or set all the uses to 2. It makes alchemist think of their uses strategically before just yolo tarring someone. It adds a new layer to alchemist instead of basically using 2/4 abilities that you like every time
Just make alchemist have to uses each potion by N4 and cannot use a potion twice until every potion has been used once. As I said before, it adds a new layer of strategy to the alchemist class I seats of mindlessly using the potion.