This is actually one of my go-to ladder decks. There are enough good Justice cards that you don't have to play any really janky nonsense, and you can have a pretty strong linear gameplan. Also the power is ridiculously consistent because it's hard to have too little with the ramp, hard to have too much with the empower/bombs, and you never have to worry about influence. It is weak to removal heavy decks but Reyna has actually helped a lot with those, and sometimes they kind of fold to Citywide Ban. I did have Sword of the Sky King instead of Marty's Chains for removal decks, but Chains is amazing and I think it's better overall.
The Hooru crest is probably better as a Combrei one to trick people into playing around Stand Together. But I like Hooru so I went with that. I do think you want exactly 4 crests though.