The way to win with this deck is by stalling until your opponent decks out. You can never deck out as your key card, Sword of Deep-Seated, will always return to the top of your deck when it is sent to the graveyard. This creates a simple cycle:
Thunder Dragons can be used alongside with Switcheroo to get more draws, giving you more consistency to get the cards you need. A starting Thunder Dragon in your hand will shorten your deck to 18 cards by activating its effect. This will allow you to have a better chance in getting the cards that you need from your deck.
I believe you mean magic reflector, the way magic reflector works would not take up 1 spell/trap slot is better than Curse of Royal which will use up 1 slot until your opponent tries to destroy your magic balloon