First question is how negative is it actually? Most people think their CT is worse than it is because of camera angle and lens distortion. Get an actual measurement in degrees before you start trying to fix anything. If it's within 2-3 degrees of neutral, bonesmashing or taping isn't going to move the needle — you're better off working on brow ridge and orbital bone definition through mewing and posture which changes the perceived tilt. If it's more than 5 degrees negative that's where surgery starts being the only real option.