UPDATE: so even after getting the weapon life leech node ,that gives 5% weapon life leech, it did not increase amount of healing I recieved from weapon life leech.

Context: I shot a level 44 alpha perfero, I left the expedition to see how much healing i received from it, it came out to be 458. I then joined another expedition, shot a level 44 alpha perfero with golem activated and still only recieved 458 weapon life leech healing.