i've tried a lot of mineral licks. lots. and i put cameras over all of them at once just to see what gets hit the most. i can't tell you what's the most beneficial but one thing i can tell you for sure (in my areas) is that nothing beats a 50lb salt block. the only thing that got me more pictures was a trophy rock but salt lasted way longer and cost 1/3 as much as a trophy rock.
one funny thing was i had a big apple flavored salt block once and got no pictures of deer. the only pictures i got were some cows (no farm in less than a mile from my place so i was shocked to see cow pictures). kind of funny.