How to jailbreak ios 6.1.4 for iphone 5? Or downgrade it to 6.1.2?

I just jailbroken my iphone5 which ios 6.1.2 but it got ibricked therefore i have to restore and now im stuck to 6.1.4

You can't do either.

Actually There is No Jialbreak for i OS 6.1.4, You can find many links online, But most of them are fake. So don't go for it, may its ruin your iPhone. For more details to Downgrade iPhone Most easiest way:

There is no jailbreak for ios 6.1.4, you have to wait!