And just played my first Dota 2 Invoker game -- against bots since I barely touched Invoker in Dota 1.
It was really entertaining. Playing Magicka definitely helped getting spells out quickly lol. By the end of the match I was actually making use of the 2 second CD on Invoke which is a first for me. Hardest thing was managing the cooldowns on all your skills... and early game mana management is a nightmare.
I still don't see how he hasn't been nerfed more. He has some amazing abilities and late game can do anything. Can go invis, stun, disarm, mana burn, slow, global nuke, summon creatures, buff DPS... good grief.
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No amount of planning will ever replace dumb luck.