Suggestions:
Ophiomancer: good snake-maker. Synergistic with Ertai. Good "rattle snake" card...
Phyrexian Arena: I have a hard time not putting this in every deck containing black ever.
Dictate of Erebos: Strictly better than Grave Pact in a 3 color deck. Only item of concern is curving into your commander, but this is one you'd likely use after you cast him anyways.
Seal of Cleansing: synergy with Ertai, good rattlesnake, I'd run this over Disenchant.
Seal of Removal: You may or may not want to run this, but again it is a good rattlesnake card (people hesitate to attack you), good utility, synergy with Ertai.
No Mercy: people sometimes don't like losing attackers.
Silent Arbiter: Great Pillowfort card.
Mystic Remora: auto-include in blue, synergy with Ertai.
Cuts: This is the worst part of deckbuilding. I hate cutting.
Disenchant: if you run Seal of Cleansing
Norn's Annex: This is a great pillowfort card, but I would rather have Dictate of Erebos, Seal of Removal, or Ophiomancer
Crawlspace: for Silent Arbiter since the arbiter can feed Ertai.
Also, it would be hilarious to run Dovescape.
To reiterate papafunk's point. If you're getting crushed by a T2 Thran Dynamo in casual, multiplayer games you/your group is doing something wrong.
Nice
That said, Brago, King Eternal is the most combo-centric and probably most powerful, Raff Capashen, Ship's Mage has great synergy and utility with superfriends, and Isperia, Supreme Judge while a cut below the other two still has good synergy and can be a finisher. Plus you should have a solid amount of artifact ramp whether you are playing her or not, she's the cool, albeit slightly less powerful choice.
If you read the OP she is talking about how she stopped running Kaalia due to social pressure. In that context running Maelstrom Wanderer does nothing to solver her problems, and arguably amplifies them. Whether or not you are able to get cascade triggers from casting MW really isn't relevant in that context.
Asking prices are for the most part not very useful in determining the actual value of a card. While asking prices CAN affect the perception around a card, I think that it almost always makes more sense to just check something like "Sold Listings" on ebay to see what money people are actually willing to pay for something.
As of yesterday copies were selling for ~$190, but there are only a few copies of that card on ebay at the moment, and several cards on tcgplayer all asking for double that (~$400+). One of two things will likely happen in the short term. One: people decide to continue buying FTV: Mox Diamonds at twice the price they were yesterday and the price is justified and stabilizes becoming the new norm even with people deciding to dump theirs, or two: people don't buy at >$400 and the price regulates to some degree over a short period of time while more copies enter the market.
To track back to the original point though, the actual value of the card is ~$190 until people start buying it at higher prices, which no one has yet that I am able to tell.
Depends on your play-style though. I prefer instant speed effects, and subtle plays over windmill slamming the biggest, beefiest, most attention-getting thing every turn.
Plus, there's always the chance that someone lands on the next Reserved List Legacy bomb like Drop of Honey. For me, I grabbed some of the sort of CMDR playable Reserved List cards a couple of years ago with the feeling that "I better just get these now".
With the guarantee of no further increased supply, people seem more inclined to buy cards they may not need now, but might possibly need later just because they may never decrease in price. On a personal note, the consistent RL buyouts have diminished my interest in MTG finance and MTG in general lately. It used to be kind of fun to try and figure out what was going to spike next based on history, now it's just sort of blah for me, but I'm sure it is probably pretty exciting for others pulling out old, previously worthless cards and realizing that they are now supposedly worth a fortune.
Just my 2 cents. Also, no one has swept anything under the rug. This forum seems pretty plugged into what is happening with the RL buyouts, but I think fatigue has set in regarding discussion of the topic, which is completely understandable.