Board Thread:Q&A Board/@comment-31559515-20170505140851/@comment-28880054-20170505213315

If your setup uses a lot of upgraders, I'd suggest Sage Redeemer. If there aren't many, use Sunken Past. Sage Redeemer uses the equation (U/2), where U is the amount of upgrades an ore has, to make the multiplier. Industrial Firecrystal mostly works on Nature's Grip last I checked, just not all of the ores.