Pickle

Megrim and Underworld Dreams
It's been pretty consistent the last dozen games or so, try it out! Pickle, since it puts your opponent between drawing too many cards and discarding too many cards.
Creatures & Planeswalker
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2 Swans of Bryn Argoll
2 Jace Beleren
Sorceries
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2 Compulsive Research
2 Dark Ritual
4 Megrim
4 Windfall
2 Hymn to Tourach
4 Underworld Dreams
2 Vision Skeins
3 Wistful Thinking
Artifacts
-----------
3 Teferi's Puzzle Box
4 Howling Mine
Land
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9 Swamp
8 Island
4 Sunken Ruins
4 Dimir Aqueduct
It's been pretty consistent the last dozen games or so, try it out! Pickle, since it puts your opponent between drawing too many cards and discarding too many cards.
Creatures & Planeswalker
-----------
2 Swans of Bryn Argoll
2 Jace Beleren
Sorceries
-----------
2 Compulsive Research
2 Dark Ritual
4 Megrim
4 Windfall
2 Hymn to Tourach
4 Underworld Dreams
2 Vision Skeins
3 Wistful Thinking
Artifacts
-----------
3 Teferi's Puzzle Box
4 Howling Mine
Land
-----------
9 Swamp
8 Island
4 Sunken Ruins
4 Dimir Aqueduct