>>96959814
>Is a mono white lifegain deck with Felidar Guardian/Test of Endurance too strong for bracket 3?
No. Those are perhaps the most telegraphed and well-known wincons ever with lifegain decks, if your opponents don't save removal for the most obvious cards you'll ever play, then that's on them for being too stupid for bracket 3 games. Be sure to include pic rel for a "daring today, aren't we?" reaction from the table