Yeah, I'm not saying it doesn't work, just that it could be hard to pull off. Also, the director doesn't seem to like it when you backtrack too far... Every time we do, we get hit by a mob hard. Though when you get a tank in a small area, you run the fuck away.
And the tank is a lot slower climbing than running, getting on the carts in Blood Harvest tunnels for example and jumping between them can work great (until he throws that fucking piece of concrete).
EDIT: Oh, and I don't know if
this is old, but FUCK.