[moldyrocks]

For me, the Top Left, Top, Top Right, and Bottom Right boxes seemed to work the most.

I started with with a lvl 15 mace and placed the Regular Elrue [1], in the bottom right box and first try got a +2 enhancement. Then I used a lvl 10 mace in the upper left box and got a +1 enhancement, then another lvl 10 mace in the upper box and got +1, then upper right box with the +1 lvl 10 and got +2 then repeated the +1 lvl 10 mace in the bottom right box and got it too +2 lvl 10. But, when I tried to enhance the first +2 lvl 10 mace to +3, it busted.
But at least I got a +2 lvl 10 and a +2 lvl 15 mace.

Thanks for the hard work and suggestion Triumph.

Cheers,
Moldy