Gramma Tala, Spirit of the Ocean It seems the theme for Into The Inklands is to give some of the ink colours a lore payoff for things theyre already good at doing, and what does sapphire do better than give you extra ink on your turns
The most impactful that Id personally pick would be: Deflecting Swat, which is always good when you need to protect a Commander that attacks for value and damage
Dion himself could easily helm a mono-white Knights deck, offering a very flickerable token generation and evasion, with a later game ability to pump the team and even blow up a permanent
Flooding the board with crazy tokens like 4/4 Angels or 7/7 Dinosaurs would be possible thanks to Ojer Taq's effect
Scavenging Ooze is a pretty good card, but it just seems weird to be hating on other people's graveyards when you're so engaged with manipulating your own
Marang River Regent I like cards with multiple modes, and Marang River Regent is a beefy dragon and a slick draw spell all in one