I liked difficulty when understood more about others spells and how I can combine then. But at start I was confused.
I didn't understand at start that ice spykes are at touch distance and how much I need attack enemy to kill them and how manage to do it without dying.
At the end I came up with strategy: set totems at the end of the line - when enemy near it: use ice spyked ones and after recharge second time to kill.
Mostly difficulty was to figure out strategy, but after 1 level everything was better, I have had strtegy + new spell.