So I put together this amazing Bloodrager build which utilizes Metamagic rager and the Magical Lineage and Wayang Spellhunter traits along with quicken spell. But can you combine the traits and the metamagic rager ability?
From my reading both require you to apply a metamagic feat and once that happens the spell level reduction of Magical Lineage kicks in and the cost in rage rounds is reduced.
Magical Lineage
Pick one spell when you choose this trait. When you apply metamagic feats to this spell that add at least 1 level to the spell, treat its actual level as 1 lower for determining the spell's final adjusted level.
Metamagic Rager
At 5th level, a metamagic rager can sacrifice additional rounds of bloodrage to apply a metamagic feat he knows to a bloodrager spell. This costs a number of rounds of bloodrage equal to twice what the spell's adjusted level would normally be with the metamagic feat applied (minimum 2 rounds).
The metamagic rager does not have to be bloodraging to use this ability. The metamagic effect is applied without increasing the level of the spell slot expended, though the casting time is increased as normal. The metamagic rager can apply only one metamagic feat he knows in this manner with each casting. Additionally, when the metamagic rager takes a bloodline feat, he can choose to take a metamagic feat instead.
yeah, I say they work. The spells adjustment for you would normally be +3 with the feat applied.
but I'm curious, what of this build makes this a worthwhile build to try?
Trait bonuses DON'T stack.
IMO they shouldn't. It's just a trait for a benefit that you can't gain in any other way.
Many traits grant a new type of bonus: a “trait” bonus. Trait bonuses do not stack—they’re intended to give player characters a slight edge, not a secret backdoor way to focus all of a character’s traits on one type of bonus and thus gain an unseemly advantage. It’s certainly possible, for example, that somewhere down the line, a “Courageous” trait might be on the list of dwarf race traits, but just because this trait is on both the dwarf race traits list and the basic combat traits list doesn’t mean you’re any more brave if you choose both versions than if you choose only one.
Trait bonuses don't stack, you are correct. But the benefits of traits can stack. Neither of these traits give any bonuses, so there's nothing to stack or stop from stacking.