When you (try to) create wiki link for clients, which is better?

1. Editing from a single wikipedia account (for all clients) with lots of previous edits and generally helpful wiki behavior.
OR
2. Making a new account, clean a few things here and there, possibly adding content (unlikely) and then adding a link.

Assuming in both cases the link is relevant quality content that ADDS to the page and not just replaces other link.

U can do this with new account also, approval depends on how important the targeted wiki page. If targeted wiki page is authentic then u need old account. I did wikipeda link building using new account and it was accepted.