Imo Cryomancer is the way to go for D'Vorah. But this matchup got harder after the patch. Before you could crush her wake up with jump in 1 1 after a hammer ended. Idk if this is a thing now that her armor is faster... This is gonna be a tough match any way you slice it. Don't use ice ball, it's useless in this matchup. I suppose something that could help is when doing a one bar combo, just F42gap xx ice blast F12 for the frame advantage and force the mixup. Anything that keeps the momentum from D'Vorah. Another thing is that she neglects one of Cryomancer's strengths. Usually you shouldn't break, because Cryomancer can deal more damage to make up for it but D'vorah goes blow for blow dealing just as much damage sometimes meter less. Breaking might be a good option to take away her stamina. I'd recommend trying to stay just outside F4 range and try to force something to whiff, or do a cross up, or a D4. D4 tends to be a good help in this match, good range and it's like plus 17. Air hammer is good if you get her in the corner because it crushes wake ups. And if all else fails, 50/50. This is a really tough matchup but it's not unwinnable imo, it's just really dumb.