Abyssal Tiefling Bloodrager... into Demoniac??

[armordude1]

Hiya, new here and not super familiar with the whole of pathfinder yet. I have a concept for a tiefling (pit-born) who wholly embraces her demonic side and worships Baphomet (but is also smart enough to stay in her lane and probably keep cool until she has enough power to safely do his bidding.) Currently, my stat spread is:
Str: 18 (16+2)
Dex: 12
Con: 16
Int: 11 (13-2)
Wis: 9
Cha: 15 (13+2)

I'm thinking about building her as an Abyssal Bloodrager into Demoniac. We're starting at 3rd level, pretty much the only feat I'm confident I want at this point is Monstrous Mask (since the early campaign is supposed to be fairly social). Any advice on my stat spread, class choice, or prestige class choice? Is Demoniac like, as bad as I think it might be? Or would it be salvageable? My DM seems fairly reasonable on this front.

[Vaellen]

I'm assuming you are playing in an evil campaign. Stats look good and I assume your GM is experienced and knows the can of worms he's allowing you to open.

Staying in your original class is more optimal but if you want an evil PrC than Demoniac has great flavor. Just try not to die.

[Brolof]

Demoniac isn't awful for a cleric or oracle, since it gives you that one free extra spell per day, but it's really not good for a martial like a Bloodrager. Instead, I'd personally suggest the Sentinel Prestige Class.

It's got a very similar flavor to Demoniac when you worship a demon lord, but is specifically designed for martial characters in mind. You'd lose out on your spell casting, but gain a ton of martial goodies, enter it two levels earlier than possible with Demoniac, and get more useful divine boons. Baphomet's in particular are flavorful and pretty useful for a martial character.