If you are just looking to protect the combo, what about Dispell?
I've done another set of goldfish testing using the following build:
2 Flooded Strand
4 Misty Rainforest
10 Island
2 Tropical Island
4 Brainstorm
2 Opt
4 Impulse
4 High Tide
4 Reset
4 Merchant Scroll
3 Cunning Wish
3 Turnabout
3 Meditate
2 Hunting Pack
1 Brainfreeze
4 Force of Will
4 Remand
The list is far from tuned, but I wanted to see if was possible to create a list that could (generally) go for either win condition. Here are the goldfish results:
a) 11 storm - High Tide, High Tide, Turnabout, Meditate, Brainstorm, Cunning Wish, Turnabout, Brainstorm, Brainfreeze, Remand, Brainfreeze
b) 3 storm - Reset, Reset, Hunting Pack
c) 4 storm - High Tide, Turnabout, Cunning Wish, Hunting Pack (mulled to 5 to find land)
d) 6 storm - High Tide, High Tide, Reset, Cunning Wish, Impulse, Hunting Pack
e) 4 storm - High Tide, Merchant Scroll, Turnabout, Hunting Pack (went off in my own turn)
f) mana screw
g) 11 storm - High Tide, Reset, Reset, Reset, Meditate, Meditate, High Tide, Cunning Wish, Brainfreeze, Remand, Brainfreeze
h) could not find High Tide or Untap
i) 11 storm - High Tide, Turnabout, Meditate, Turnabout, Impulse, Reset, Turnabout, Cunning Wish, Brainfreeze, Remand, Brainfreeze
j) could not find High Tide & only untap was Turnabout
Overall, I was surprised by how well the list worked. Merchant Scroll, the only sorcery, was every bit as good at finding High Tide (or whatever I needed) as I though it would be. I chose to remove Peer Through Depths to make room for it, as PtD is also unable to find land, so my mana fixing does not suffer, and they have the same casting cost, meaning my curve remains the same.
There were also unexpected benefits to Merchant Scroll. I was able to combo out once on my own turn, thanks to being able to tutor for Turnabout. It also has fantastic synergy with Brainstorm, providing a shuffle effect. The only real disadvantage was that I had to commit myself to a sorcery speed turn 2 or 3.
The other draw is less powerful than Bahumuth's list - it simply costs more to dig at instant speed. The plus side is that I was, where appropriate, easily able to combo out in the traditional way.
With so much control over sculpting my hand, I often found myself opting for the "certainty" of the Hunting Pack win. In the absence of disruption it was easier not to rely on drawing into high storm counts - Hunting Pack gets you there with only cards in hand. I typically only went for the traditional win if I had a Meditate in my initial 7, as Meditate and Hunting Pack are clearly not good friends.
As a result, I never used the maindeck Brainfreeze. I would probably remove it for the 4th Cunning Wish. Again, it is worth noting that the Hunting Pack win is very tight on mana - you are not going to be able to protect it with Remand. Not something I would want to try against control with only 4 lands in play. That said, it is not likely that you would ever need to try it with only four lands against control.
Merchant Scroll, while powerful, is very poor in multiples, because a turn you cast Merchant Scroll is probably not a turn you combo out, as you start off two mana down; a High Tide Reset hand can be disrupted by Daze, and High Tide Turnabout can't do it at all. Perhaps only running two or three would be better.
As a side note, if we are running Merchant Scroll to find High Tide, does it make sense to move a Tide to the Wishboard?
-Silent Requiem

