Yah, I get the life gain idea that's a pretty good reason to splash white but
diamond mare might just be the better choice. I could totally see adding a couple board wipes SB too. In my gold fishing, this deck seems to find the combo way easier and much quicker than the old version between
Opt, Discovery, and
Omenspeaker. Usually being able to assemble the pieces on turn 6.
And yah, the only reason I haven't played this or even tried crafting the pieces is because you cant combo well in Arena.