If you find a WL with "correct" gearing around that ilvl it will surely be no problem to sim him.
Adding to what Liquidsteel postet:
I simmed a BiS equipped WL in a long fight (Thok for example) and there the difference was like this:
You didn't mention the specc you want to play, did you? As you see, comparing this results with Liquidsteels, the difference in racial-profits is quite huge depending on it.
EDIT:
True - although I understood it as an example that had completely random numbers.
EDIT2:
I understand your concern. I'm doing this with many of my alts to - although I almost never play them regularly.
Nevertheless: It is nonsense