Yeah Mjolnir was an axe/hammer type weapon. I found it wasn't very useful at end game though Gungnir was much better but I still wonder why the MC couldn't use knives (the guns are understandable since they attach to Aigis' arms).
Thor w/ Elec Amp+Mjolnir. That is literally all you will ever need pre-Answer unless the enemy abs/null/reflects both thunder and physical. Elec Amp boosts the damage of Mjolnir. This is not even considering how hilarious your damage will be if they happen to be weak to electricity. >_>
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KrahenProphet and Kana are on opposite ends of the Awesome Spectrum.