The evoker talents should be changed to + 25 % damage, because the damage difference is currently too big.

The brilliant talent should be changed to + 3 intelligence.

Every spell effect should be based on the heroes intelligence. The bonus effect should replace the bonus XP and it should be intelligence x 2 %.

Every element should have a spell to change the type of a shard to that element (spell level 3 and 100 mana).

Fireball should be changed into two different spells: A spell that affects all units in a single square and a spell that affects one unit per square within a 1 square radius.

Blizzard should be changed into two different spells: A spell that affects all units in a single square and a spell that affects one unit per square within a 2 square radius.