No, you can't. You do not have the power to implement Approval Voting, and nobody who does have the power wants to do it. So it's not gonna happen, at least not in the short term. Right now, anybody who wins has to win in an environment of First Past the Post. Nobody capable of doing that currently supports Approval Voting, so right now it is effectively not on the ballot.
This is what I mean about "hav[ing] a viable strategy." Magically wishing Approval Voting into existence ain't it.