(welcome crimsonson !)
Yes Valygar dual-wielding C.F. and his bleeder katana is VERY tempting, especially in backstab mode
... SUGGESTION: You might consider swapping Minsc for Valygar, IF you wish to use Edwin instead of Nalia; reason being: (and I don't know if this is really a SPOILER - hell you already know about Yoshimo's *thing*... well, just in case: )
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--Edwin and Minsc, they don't really get along, and after a while they will REALLY hate each other, with disastrous results to your party (I'll say that much)- maybe you already knew about this problem... If you want to keep Minsc you should use Nalia for your lead mage
--Mazzy I haven't used yet - maybe next time - but apparently she's practically a machine-gun with arrows so why not give her a chance...
--bit of a pity you won't have any romance dialogue with your current lineup, but whatever...
Good luck!