| Secret Wizard |
1. Saving Shield is an immediate action, Bodyguard is not an action at all. You can even use them together.
2. It's not a feat tax if every single piece in the feat works with each other. Combat Expertise is a feat tax for Imp. Trip because it doesn't aid your tripping at all. Vanguard Hustle does aid your Saving Shields, Bodyguards and so on, through Combat Patrol, so it needs all of those pieces.