Unstable Elements, especially Lightning, needs to be revised

[tymora]

So...Electrum Ring is a rank 44 magic craftsmanship recipe and you're trying at 35. 9 rank difference, runaway instability, not surprising. I do not know what is your magic craftsmanship at, so can't comment on that.

As for Buffalo Leather, well, you should be well over the "recommended craftsmanship" values. If assuming you are using the proper facility and have the treatise, then I admit something is wrong here.
-> Have you tried increasing both your Lightning and Earth affinity? Never tried it myself nor have I ever encountered this problem at 30-ish Tanner, but I heard this helps.

My own experience is that I get ice more often than lightning and my affinities for those are 80/92 respectively.