I need some advice on a potentially applying the rules for Mythic characters to just one PC in a party of three.
A little background first. The party is made up of a ranger, an alchemist, and a rogue (the PC in question) (all level 8). The rogue is significantly behind the other two characters in terms of combat ability and power, and has acquired the least amount of coin from various side plot opportunities. The rogue character is a lawman, while the ranger is an assassin who has made a great deal of money from looting his enemies and being a blackmailer. Somewhat similarly, the alchemist has started his own business and is going to start raking in the money.
This has left the rogue behind in terms of power levels. I don't think this really bothers the player: he has had some fantastic moments role-play wise, and his character often overcomes potential battles and conflicts with quick thinking and cunning. But I am still concerned about him falling behind, even as the campaign is reaching the half-way point.
Part of the campaign's plot involves a new god of justice emerging, and the rogue character has been chosen to be the new god's mortal instrument (for reasons that have not yet been revealed). I have only recently been looking at the rules for Mythic characters, and I realized that perhaps I could make up the power gap between the rogue and the ranger/alchemist by granting him the first tier of a Mythic path.
The advice I require is to how well this would play out in terms of game mechanics. I have never made use of the Mythic rule set before (nor even really read up on it), and I have even less of a notion on how the rules might work if only one member of the party possesses a Mythic Path. Any thoughts, comments, concerns, etc would be greatly appreciated.