I'm not sure which side you're trying to argue, Sambojin.
Making Brick Silver a 'gimme' via this method wouldn't necessarily be a bad thing, since the alternative is phasing across, killing everything, then getting stuck, so you've technically fulfilled the badge's requirements but fate has rolled a dice and decided that no, you don't get credit for it, you should QY and do it again.
Barring a few specific scenarios where the moons align, clearing The Wall on either of the relevant angels is not exactly a walk in the park. I'd say that on its own is around Silver level.
Edit: Yes, phases can carry you past The Wall on AoMr and AoB; a situation like the one in this post is what prompted me to think of how to make the badge less of a hassle.