Your commander is effectively an 8/12 creature with reach in combat, so its far from useless and defends you well against incoming fliers
Id want to add Delayed Blast Fireball, Wild-Magic Sorcerer, and Nalfeshnee, plus combat tricks that cantrip, like Expedite, Crimson Wisps, and Might of the Meek, to help draw and exile cards
Merfolk has a critical mass of lord effects, and copying them can lead to a terrifying snowball effect
Let's check out where my deck was when it was retired
You have the best permission, the best card draw, and some of the best planeswalkers in the game
There was also another Jumbo card from that same tournament which is similar as the French insert used with some WotC era promos (i.e