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I really like the warne rings with the vertical split, the nature of how they install means that you never need to lap or align them and they never leave marks for me. They also have three different versions with return to zero guarantee so I've been using picatinny rails so I can just move them from rifle to rifle as desired.
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I recall an article by Ross Sefried where he recommended using 3-M brand liquid electrical tape in scope rings. I think he said it worked well on his heavy recoiling rifles destined to be used in Africa. Claimed he never had experienced any scope movement nor gotten any ring marks on his scopes. I think he mounted the scopes when the liquid was still wet and just let the excess ooze out. I remember him writing that the excess was easy to remove after it had dried.