OK as i said double cast is neat skill, but if you played warrior before you`ll know that at 42lvl you have 40+Klds, and can bring 17+maelstorm with much higher basic att/def making 30K crit hits and with counterstrike skill, making him retaliate 4 times/round and this is also tactic impossible for mage. Every hero class have it`s perks, that`s why i asked Lantisu10 what class he play, and what item`s he have at disposal before i suggested some combinations to him.
And i just now figured out imba info for maelstorms lds, as you said 2 commander cloak upgraded makes -30% lds, and if you find ancient ring would get them to 2100lds/unit pretty sick