As at commit d1fa088 the LP gotten from manually sacrificing an entity are hardcoded in the method outlined by these lines here
Could these be changed to be public static final fields in a class in the API, so that we addon makers can balance around them better, and stay balanced should future updates change these values?

Because the 1.7.10 build of BM is no longer being worked on, we are clearing out non-critical issues for that version. Please let us know if the issue is persistent in the 1.8 releases.