Crashing Through

Although it is difficult to calculate more than a few moves deep in blitz, the positions created in such play remain instructive. White has a clear advantage in this position, but the final blow was not clear to me. I had White.

White to move

The game continued 26.Qh8+ Bg8 27.Ne6+ Rxe6 28.fxe6 Qxe6 29.d7 Rd8 and it is no longer clear that White has the advantage.

How might I have found better moves with only seconds available for calculation?