Is there any possibility to combine two mods into one . Eg. Reaper pack mods with another weapon mods. does anyone have suggestion or idea how this can be done.

I've also wanted to do this, eg combining the wds weapon mod with the mod that allows for the moon EE to be done solo
I don't believe this is possible as there are seperate .ff files that handle each mod and BO1 can't load two at once
You'd have to have a working knowledge of BO1 modding and the source mod files for each mod to combine them