I really wish I could post images so I could share my map of the Cosmos. It is a series of circles overlapping each other, these circles are leylines, safe passageways through the dangerous Astral Plane. Deviating from them is suicide and only the craziest of planeswalkers would dare. On the circles are dots, which represent new and unique planes, each with their own peoples, histories, magics, and gods. To allow players of all classes to planeswalk I came up with a few feats that grant Planeswalking as a Spell-like ability. I like this approach because it allows the players to decide if everyone should take the feat or if only one person should. If one person takes it, then the party is forced to rely heavily on that person (WHAT IF THE DIE?) Meanwhile, if the party spreads out the burden then they can potentially travel further in a few days together than they could alone.
NEW FEATS
Planar Sojourner
Prerequisites: none
Benefit: This feat allows a Planeswalker to cast Planejump 1/day
Planar Pilgrim
Prerequisites: Planar Sojourner, 5th level
Benefit: This feat allows a Planeswalker to cast Planejump a number of times per day equal to an ability modifier of their choice.
Planar Traveler
Prerequisites: Planar Sojourner, Planar Pilgrim, 10th level
Benefit: This feat allows a Planeswalker to cast Planeleap a number of times per day equal to an ability modifier of their choice.
Planar Master
Prerequisites: Planar Sojourner, Planar Pilgrim, Planar Traveler, 15th level
Benefit: This feat allows a Planeswalker to cast Planeshift a number of times per day equal to an ability modifier of their choice.