Going to do some rather crazy theory crafting here. So Chrysalis’ magic has corrupted the elements. Want to know why magic starts disappearing from the world? Cause the Elements of Harmony have taken on a certain changeling characteristic. Ultimately, they’ll have to be broken and the last season will deal with forging new Elements to take their place. XD
I see her as being weaker than a rather powerful unicorn, when she’s not powered up on a lot of love. Shining Armor could take her on in a straight fight, I’d like to think, Cadance, Starlight definitely can, the real Twilight, of course, Celestia and Luna, that’s a given, because Chrysalis herself thought she’d lose to Celestia, being surprised when she won, and that was when she had a lot of power.