Ok, let's see. It depends of what my enemy is doing. If he plays a watergate or summons a early gorgon archer, his strategy is defensive. I have some time to build up, but because i'm melee oriented, i'll advance to his zone slowly, using all my actions.
(1) -> 20 Mana
Full Action -> Move 1 and construct a forge, that can cover most of the arena.
Quick Spell -> Enchanters Warstone to the starting corner
(2) -> 18 Mana
Forge -> Deploy Defense Ring
Full Action -> Move 1 and construct a Temple of the Dawnbreaker near starting corner.
Quick Action -> Bim-Shalla near starting corner
(3) -> 13 Mana
Forge -> Deploy Dancing Scimitar
Full Action -> Move 1 and deploy Enchanters Ring
Quick Action -> Hidden enchant Bear Strength on you
(4) -> 16 Mana
Forge -> Deploy Galvitar
Quick Action -> Teleport 1 Zone (to the enemy or teleport enemy to you)
Full Action: Reveal Bear Strength and attack with Full Attack of Galvitar 8+4+3 Dice. Even the quick attack with piercing 2 could destroy a wizards tower.
If a gorgon archer is on the field, use your double defense to block his attack. If you are cursed with Agony or Enfeeble, dispel it immediatly. The enchanters wardstone should keep your own enchantments relativly safe.
If you fear a dissolve on your equipment, simply add the Armor Ward to your collection.
If your approach is somewhat successful, add a Akiros Favor, so your attack always deals a good amount of damage.
If your enemy summons devouring jellies, ignore them, evade them (they are slow and attack with full action only), use a force field and dont waste mana on armor items. Deploy the reflex boots instead for more defense capabilities.
If you get hit, use regrowth.
Your main goal is: Use your strengthend melee attack (0 Mana cost) to kill costly things from the enemy, that are easy prey (gorgon archer, wizard tower with a bound spell etc.).