For those newer to Magic: The Gathering, the whole point of Jumpstart is speed: take two boosters, shuffle them together, and you have a playable deck with all the Lands already included
Do you want it to be creature-based or more heavily focused on planeswalkers or enchantments
Still, its useful in all kinds of builds, especially if you can cheat it out or reanimate it
Many of the best Partner Commanders MTG succeed because their abilities naturally support scalable strategies such as card advantage, mana generation, or combat pressure
Just be prepared, if you're looking to buy them, you could have to break open The Money Bin
So you want them at the top of your Life area as early as possible