Let me shed some light on this topic. I was a big victim of the mystic toilet and loosing gold. I first was going for Dusk/Dawn a few months ago and using lvl 80 rares and got screwed out of about 150g and I felt I was never gonna get a precursor. Today I felt the need to gamble so I went to the TP and bought what I thought was lvl 80 exotic hammers (50 of them for about 60g) but it turned out that they were level 71 exotics (derp). Oblivious to this I went ahead and started combining them and by some amazing luck I got The Colossus on my 6th try! I could not believe what I saw when I got it. Later I went to go sell the extra hammers I had left over and realized the ones I bought were lvl 71. Let me just say this is was VERY VERY VERY rare and lucky and I wouldn’t advise you to spend what little gold you have unless your determined. If you are so inclined I would recommend you use exotics, although they are more expensive, you will always get an exotic in return. So these exotics, from what I found, DO NOT have to be lvl 80! Not sure what the minimum lvl is but each time i used 71s I got an 80 back. Don’t hate me if you try and come up with nothing because believe me I know how it feels. But if you reallllllly want to give it a try id use exotics lvl 80 or not. Hope this helps and good luck to anyone who would like to give it a go!