Its not unwinnable by any stretch of the imagination, but this is the roughest matchup by a longshot

Deck List Xyz MonsterDeck List The Phantom Knights Deck and Deck Instructions "The Phantom Knights" Deck 2015 Deck Introduction/Deck Commentary Related deck "Xyz Monster" Other Deck List 2023-01-01 Spirit (Hope Fluffy Zark Axis) 2022-10-09 Xyz with trap monsters! 2022-08-13 Hope spirit improvement 2022-07-16 And the hero reaches the Utopia 2022-07-03 Spright after restriction revision 2022-02-21 hope spirit 2022-02-14 NR Limited Machine Axis Spider X Deck 2021-10-25 Rhino Eraser 2021-10-22 777-Photographer-777 2021-09-18 Hero and Rank 8 2021-06-29 Pre-emptive Hope Deck 2021-06-27 Hope Emperor Deck 2021-06-26 Overlay Universe with Strak only! 2021-06-03 Nutos Beat (Failed) 2021-05-25 Oila's Strongest Lyrilusc See all Deck Lists for "Xyz Monster" 2023-01-01 Spirit (Hope Fluffy Zark Axis) 2022-10-09 Xyz with trap monsters! 2022-08-13 Hope spirit improvement 2022-07-16 And the hero reaches the Utopia 2022-07-03 Spright after restriction revision 2022-02-21 hope spirit 2022-02-14 NR Limited Machine Axis Spider X Deck 2021-10-25 Rhino Eraser 2021-10-22 777-Photographer-777 2021-09-18 Hero and Rank 8 2021-06-29 Pre-emptive Hope Deck 2021-06-27 Hope Emperor Deck 2021-06-26 Overlay Universe with Strak only! 2021-06-03 Nutos Beat (Failed) 2021-05-25 Oila's Strongest Lyrilusc See all Deck Lists for "Xyz Monster" Update Information - NEW - 07/17 00:39 Review Paleozoic CambrorasterCategory exclusive link 2 monsters

One is to summon it as soon as possible to protect your other plays from monster effects, the other is to keep it in the pendulum scale for a pendulum summon
[1] When your opponent Normal or Special Summons a monster(s) while you control "Dragon City Atlantis": Negate that Summon, and if you do, destroy it, then if you control a WATER Link monster, you can destroy all non-WATER monsters on the field
Not only does this make summoning higher-level cards easier, but you gain the effects of the spell/trap before being used as tribute
Since Flip Monsters could still pose a threat, Nobleman of Crossout could make easy work of them while also eliminating them from the deck