This is another friendly reminder to people feeling 'stuck' on a fight to remember all their consunables. A well timed scroll/special arrow or a pre-engage buff/potion can make all the difference.
The short duration of buffs + casting times ensures you cannot abuse pre-engage preparations as well. Just well balanced.
Relying only on your skillbook is a very tactically limiting way to play this game and doesn't properly take advantage of the extreme depth to combat.
Agreed, I used to try to be stingy with consumables, now I just use them if I need them and it makes life a lot easier. A nice steaming cloud arrow + electricity has saved me a time or two for sure.