Lets break down each of these sections one by one
It is a bit of a slow option to escape, but in grind games, you'll be thankful you can get your strongest outlaws back after a removal spell got used on them or post-board wipe
If a card copied by the token had any "when [this permanent] enters" abilities, the token also has those abilities, and they'll trigger when it's created
You can even use Zamriels ability to make your board wipes one-sided and keep the battlefield under control
Reclamation Sage is a classic ETB Naturalize effect to get rid of enchantments or destroy artifacts, and has the elf subtype, which can be relevant in elf typal decks going forward, or even in the sideboard of green decks in general
Blue is very much the runt when it comes to gold cards which seems reasonable given they trump the mono cards with ease