Firstly a few things...
- Tome of Strength is considerably more expensive than other tomes0. It also has only 1 charge as opposed to 99 as the others.
- I played as a Tank and until i levelled a few times, I had not enough mana to use any of my spells.
Now to the main point.
Gameplay is unbearably slow, I cannot stress how damn long it takes to kill or get killed.
Due to the enourmous health enemies have, spells are simply useless. Your autoattacks deal way more damage and none of the side effects they have are worth using.