Early board development is essential to winning, and most (with an exception or two) reactive strategies fail no matter which limited format you're playing
The combo piece itself generating mana is a functionality that always had the regular advantage of spammability anyway, something that perhaps warranted the banning of Monstrous Rage even further

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That player no longer has the city's blessing
Alternatively, you can just go for huge value plays with big beaters like Terastodon or Archon of Cruelty
If youve got a way to shuffle your library afterward, those bad cards are gone for good, and youll keep the best stuff