Deckbuilding Decisions and Thought Process

SB Guide will be posted next monday after I see how the meta develops this weekend from the MTGO Challenges.

Link to Decklist:
https://www.moxfield.com/decks/8v7IrQpC_ky9QJYcipISYA

I wanted to provide a bit of insight on what is going on in my head when I play with the numbers in the deck. 

3 Teferi: Did not miss having the fourth, still reliably found it a lot.
1 Emperor: Good one-of.
3 Horned-Loch Whale: I honestly love this card and would want to play a fourth, but there is not much room to play it. This card is even more relevant with Smuggler's Copter being unbanned.
2 Strict Proctor: With the meta being inconclusive, Tale's End is not a good choice. It is better to have a proactive angle of cheating in Lotus Field. With Lockdowns in the main as well, two seems to be the perfect number so you don't flood your hand with Proctors like before (when the list had 4).
3 Supreme Verdict and 3 Lockdowns: I like this 3/3 split as there are pros and cons to both boardwipes. The turn earlier for Lockdown is also relevant at times. With the introduction of Smuggler's Copter, Lockdown is increasingly more relevant as well. Farewell is no longer necessary because MonoG is no longer a deck. Did not find the 2 Proctors awkward for Lockdown either. Often, you are simply holding Proctor until you have Lotus Field. So even if you have to lockdown, it is usually Turn 4 or later, when you can feasibly pay the tax.
4 Discontinuity and 4 Get Lost and 4 Memory Deluge: Core cards, never likely to change.
3 Impulse: As most of you know, I do not like this card very much. But I do admit that when the meta is not very certain, it is better to be proactive. This is the card that allows you to be proactive with UW Lotus Field. I would much rather play Rewind or some instant speed interaction but I do not know for sure how fast/slow the meta will be.
3 Shark Typhoon: With the addition of Impulse, 4 Shark Typhoons isn't necessary since you have more digging power with Impulse. 

Sideboard:
This is where it gets a bit more funky. This sideboarding will likely change by the time I go to RC Atlanta.
1 Ashiok, Dream Render: I like it as a one-of but this card is hard to defend. I am not so sure I want it in general. I may just put a third Scrabbling Claws for added consistency against graveyard decks.
Dovin's Veto: Core in the sideboard.
1 Dream Trawler: Good one-of in the side that is a creature threat after they likely remove most of their removal post-board. It can auto-win games against Rakdos and other aggro matchups. Harder to resolve against Phoenix though but is great if you do.
1 Hullbreaker Horror: Very much liked this card especially since the Control mirrors can be harder to win without countermagic pre-sideboard. This seals the deal after sideboarding and makes your overall matchups consistent. This card is also great against Lotus Combo.
2 Mystical Dispute: Targets Phoenix and Control as well as other blue decks. Could change.
2 Narset's Reversal: Never removing this card. Have to respect Lotus Combo too much and this card is great against Pore over the Pages as well as Ultimatum.
2 Scrabbling Claws: Could go to 3 Scrabbling Claws instead of Ashiok. I like this card in the Rakdos Sacrifice matchups and I even bring it in against the Rakdos Midrange to help with the cycling power and to slow down their Kroxas. This is a good random cycler. I have not yet been in a situation where I needed to urgently exile someone's graveyard entirely. Not exiling your own Deluges as well is a big factor too.
2 Unwind: This card performed in numerous ways and sometimes autowon me the game alone as it allowed me to Deluge on that same step and dig while they just lose tempo after getting their spell countered. This is a card for the grindier matchups though and shines especially against Lotus Combo and Control Mirrors.