Mike, instead of using more MP on Tamashi no Ha, would save it for Zandaka, as it would have had to been active to use the Tamashi no Ha, and Spirit Blade. Both total made Mike consume 71 MP per minute, which was a large amount for the amount Mike had. He attempted to just attack twice with just a normal slash of his Spirit Blade, the physical damage being stronger in this case since he was a mage and thus his physical defense wasn't as much. First he had to get close though to close the gap, which made the first slash not as accurate, but being able to attack up close and personal with the second slash made it harder to dodge. 

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Attack 1: 62 + 25 Distance Penalty - 24 Seishin no Ken (DEX) - 18 Attack Speed = 45 (Miss)

Attack 2: 85 - 25 Distance Bonus - 24 Seishin no Ken (DEX) - 18 Attack Speed = 18 (Miss)
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Unfortunately the man was decently swift on his feet. Mages usually were, despite how they were in RPG games. Since they usually didn't wield weapons, mages in the Abyss practiced their dodging rather than focus on practicing with a weapon so that they could dodge any sort of attack, Mike's first strike missing by a large margin, but the second one was off by just a hair. If Mike had just been a small bit swifter in that moment of the second slash, it would have connected.