The most useful thing to use O'aka for is to either remove lore counters from Sagas, keeping them from finishing and sacrificing themselves, or removing finality counters
Instead, any card with an ink icon can be transformed into generic ink
Reach the Horizon, Prishes Wanderings, and Town Greeter each help you get Towns into play
There are two starter decks available for Disney Lorcana: Into the Inklands
Ideally, I'd want to play this character when my hand is almost empty, shifting it on top of another genie for five
Sample decklist: 4-6 acceleration 4-6 removal 2-3 midrange creature 2-3 card advantage 4-5 high-end threats 4-6 Towns Here are two versions, a GB graveyard-focused version and a more straightforward Sultai version that ramps into Bahamut