It depends what kind of other chars you have in your party. At the moment, I use Mazzy for the 2hsword/bow combo so that Minsc can dualwield, but you really do need someone for 2h swords. Maybe as a compromise you can put proficiencies in long sword and mace/flail and have him dual Flail of Ages with a cool Longsword like the Daystar? My boyfriend has him swapping all the time too (between 2 maces and 2h sword)
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Melusine
Your voice is ambrosia