I want to keep at least 3 Dream Halls in my 75. I want to keep 3 in the main, actually. Lots of DRS and Rest in Peace (SB) here. I definitely want to stick to two colors. Blood Moon is something I want to keep running for metagame reasons.

Counterspell doesn't work on creatures in up to 40% of matches against Eldrazi. Most of them run 3-4 Cavern of Souls. I would run Ingot Chewer in the side for this matchup. I don't think we should care too much about the creatures. As long as we can pull off the combo quickly after dealing with the artifacts, we should be able to race them. Blood Moon and Chewer should make this matchup positive.

I think I want a card for the 4c Loam/Maverick/DNT matchups. They are common decks here. We need to kill both Teeg and Canonist through Chalice. Pyroclasm and Izzet Charm should be enough for that, right?
I will also board in 2 Blood Moon for this match, so just 2 Pyroclasm and 1-2 Ingot Chewer should be about right.

What are the decks worst matchups? I haven't played too many games with it, to be honest.