It just so happens that Tamiyo, Field Researcher can turn the mana dorks into card draw and her -2 taps down whatever opposing stuff isn't already tapped
It sounds simple, but because there are few restrictions on who, or what, you can damage, it allows you to target cards that are Evasive, cards that aren't exerted, and, really, any card with willpower
and Lost Parabox, which isnt as consistent but has the benefit of powerful options like Iron Hands exs Amp You Very Much
Mawile can take hits from near anything and return damage with a vengeance, with the ability to knock out a Mewtwo in a single Sucker Punch
These are the free sacrifice outlets in this deck: Altar of Dementia Carrion Feeder Cartel Aristocrat Spawning Pit Viscera Seer Priest of Forgotten Gods (must tap Priest of Forgotten Gods but should probably be done at sorcery speed unless you have an instant to use with the 2 extra black mana the ability will give you) While these are probably your best targets to sacrifice a creature, there are a couple more
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