@Raijinslayer You sure that'd just be a headache?As for Eve, well, I'd imagine that nearly any fusion with her would be hard to control, since her emotional weakness is restraint. Literally the moment in which you try to put her into control is when the fusion would weaken and most likely come undone. And we also have to remember that though Eve is usually level headed,
you know, where she's not making horribly regrettable decisions involving giant f*cking boulders and trying to appear stronger than she is, with the new sort of power that would come with fusion, I think Eve would make some pretty rash choices, at least the first few times.
I think it'd be worst with Amber as his power is the opposite of her weakness, so they'd be an utter uncontrollable mess, but I can also see this being disastrous with Mars as well. In Amber's case, it's sort of like Rupine and Ido; they get along great and though they fuse easily, it's better that they don't for the sake of others. Not sure how Mars will be, though.
I think that the least disastrous fusions would be Chromite, I could see her easily keeping Eve in check, but Spinel is a close second. Sodalite and then Aquamarine would follow shortly after.
I think the most disastrous fusion we could pull off would be Eve, Mars, Amber, and Bloodstone. That would be a combination of utter unholy. Thank god that will probably never happen. XD