Its a flex, sure, but its also a way to preserve a card thats central to your deck and your playstyle
Vow of Duty, Vow of Flight, Vow of Lightning I really love the cycle of Vows in the Commander decks, they are really well designed
Treasure tokens remain on the board until removed by some action, effect, or spell
It is the decks sole maindeck mythic rare, and its from a set that hasnt been opened in almost a full year
There arent positive arguments to be made for any of them
As far as strategy goes I would recommend putting four energy cards on Arcanine on the bench before you move it into play, and one thing I do like about this card is that it can do a lot of damage and at the same time you don't need to discard any energy cards when using this card, plus you also only need one fire energy card when using Fire Mane so you can basically use this card with any type of deck if you really wanted to, you could just use a special energy card for the fire energy cost