i feel that if your not building around High Tide, its sorta an awkward card, same goes for Deceiver Exarch. I feel that there are better draw spells then Mulldrifter like Trade Secrets, same goes for Recurring Insight.
Mulldrifter and Deceiver Exarch each have the distinct advantages of being able to be utilized with Deadeye Navigator or other such effects, and Exarch is one of they keys to an infinite mana combo.
The Recurring Insight is just there because I have no idea what to replace it with.
As to the High Tide and such, my Isochron scepter will make up for the "clunkiness" of it.