[Icelander]

A potential new player in a fantasy setting* wants his character to be a magic-using spy and slayer-by-stealth. The Magery part of his character is easy enough to figure out and a list of spells useful to spies and assassins I can make well enough, but he wants the non-magical skill list, techniques and other stuff to be selected with an aim to allow him to replicate some** of the feats done by Ezio Auditore in the computer game Assassin's Creed 2 (and Brotherhood, perhaps).

Not being a computer gamer myself, I have seen this game played a few times, but I would not call myself an expert.

What, precisely, can Ezio do? What styles does the character have? What skill levels? What Advantages?

Would a DX 15 version of him with skill levels of 18 or so in relevant skills feel hopelessly inept? If so, I can reduce spellcasting ability for increased parkour and combat capability.

Are there any necessary techniques?

Any words of advice?

*Forgotten Realms, if it matters.
**For him, of course, that would ideally be all.