Tbh, my [u]guidance[/u]* would be to leave the legilimency and tone down the duelling.

The reason is that we have no other legilimens on the team that I'm aware of (apart from maybe Ronan, who is not mobile), but we have plenty of duellists. Apart from anything else, legilimency goes well with retrieving information (a big part of Viktor's role) while nerfing his duelling skills to 'adequate' would instantly give him the weakness (to anybody that can duel better than he can) that would make him feel much more balanced.

* by guidance, I mean: I'm not McHaggis, but here are my thoughts on topic x