Kief it. Then use a high shear homogenizer for 30-45 seconds.
Pretty sure @Sidco_Cat posted it somewhere.
Heat is not your friend. 8hrs at 180f will give significant decarb.
Proper decarboxylation temperatures - #2 by Ch0kingvictim
My preferred method has been etoh => Rotovap => into oil. Because formulating to exact potency is trivial that way.