Mill me harder daddy

Your deck looks solid, but I have some output.

Visions of beyond is one of the most powerfull band-waggon Cards I've ever seen.
People play it because they see other people play it, and perhaps it hangs on because we all keep reminding each other how powerfull drawing cards is. At the time where the card showed most talent everyone was playing it with snapcaster mage, because you could then play your visions during the early game and snapcaster could recast them lategame to get that cardadvantage they offer. However, snapcasters role in mill diminnished as decks became more linear, and visions can't be recast like they used to. Since mill had it's heyday, the meta has grown to support graveyarddecks which really beats mill, but even against those visions of beyond rarely brings you those three cards.

I've been campaigning for a long time to get people to play compelling argument or mishra's bauble instead. It draws you a card early game just as the visions, and it can actually kill lategame which which isn't something visions can. If you should Draw three Cards with visions, one of them will frequently be a land which you really don't need at the time. There are several other reasons why visions is obsolete, like challice 1 or discard. Mishra's bauble manages to avoid both of these, while visions would be dead in it's tracks.

As long as tron is in the meta, shelldock isle will always be hit before netting you a card.

Try to be creative with mission briefing, whats better, to mill 13 cards with a trap or to surgical/extirpate an important card. I'd try to use more surgical/extirpate with briefing in the deck.

Also give some cheaper millcards a thought with mission briefing, like tome scour, mindsculpt, breaking/entering or even compelling argument :D