You are on the play against an unknown opponent and your opening 7 is
Sensei's Divining top
Sai, Mater thopterist
You lead Ruby, fetch and tap the ruby for top which gets misstepped. There is a second top in your deck. Whats your play - do you:
Crack fetch and flusterstorm to resolve top
-Without Sai, this seems to not be the best play. However a turn 2 resolved Sai means while slow, each turn you are looking at the top 3 cards of your deck and generating 1/1 flying thopter for 1 mana if you keep the top in play.
Crack Fetch and Ancestral Recall - To me this seems to be the best play. You are letting the top get countered but more comfortable resolving your Recall since they are on their opening hand and used misstep. They could have a second, but its a low chance. This refills your hand (this is what I did and I drew FoW, Tolarian and Mentor), keeps mage handy to get the other top if you need it.
Let the misstep resolve and pass the turn. Aside from 'not giving away any info' this approach seems like a good way to lose.
What would you do?