Nope, entangled still doesn’t stop Bullseye. Not even without getting a match 4/5 skulls to actually deal damage while entanged, even match 3s can trigger Bullseye. Just tested it right now.
I actually like the Gard’s Wall weapon for a front-slot Archer, or Warlord for that matter. I never see it used, but the 1:1 ratio life gain with full gem removal and barrier makes the hero a lot more durable without needing a whole lot of support, and can free you up a slot you might otherwise need for support, which allows him to take the front spot in less specialized teams. Its not super efficient being a purely defensive weapon unless you manage to line up an extra turn with the removal, but skull trades highly favor the Archer in nearly every situation (unless stunned) so its a decent all around choice if you aren’t green heavy in your lineup. Sadly, you need 35 red mastery to obtain it, otherwise I’d suggest it as an early game weapon.