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I like all those concepts for creativity reasons but not fainting a Pokemon is really only achievable by making setup fodder or permanent destiny bond. And the end of priority would call for a very centralizing Pokemon, which a lot of teams would need because priority is everywhere.
I'm extremely interested in how a Pokemon can be used to gain early game momentum against a variety of strategies, especially with the banning of Deoxys from OU. Hope this wins the poll!