Two Masters : Two warring entities have sway over the PC(s), either of which can make survival untenable. (Explosive collars, guild control over all traders / moneychangers, heat seeking intercontinental empowered fireball spells aimed at the party, etc). Juggle the knife edge of their graces until the PCs can liberate themselves from both.
Loyal Traitors : Seize power from your (feudal lord, starship captain, primary AI shard) but until you're ready to do so pay tribute/strengthen the current powers that be so that the Outsiders don't conquer you all. Tribute strengthens logistical support but makes final conflict proportionally harder.