Investigated the issue with fluxed electrum and rather than remove it entirely, I’ve added a tech mod to facilitate making the ingots. The issue is that Moar Tinkers adds it but didn’t actually bother to check that some other mod added it or not prior and therefore you can make it by the bucket loads in a smeltery and that’s it. You can’t actually cast it, although there are molds and castings available as according to the JEI. So by giving you something else to play with that solves the problem without removing what you are started drooling over.
Also added HWYLA (shows what you are looking at) and Waila Harvestability which shows what you need to use to harvest the item.