truth be told, it's not really your fault. Lance has a terrible matchup against both monsters. Raging brachy sucks for lance cus of the floor slime, which is leagues easier to avoid with any other weapon type. Rajang just deals so much chip damage that even with guard 5 on your lance and perfect guards, he will eat through your health unless you have a bunch of health augments, and are constantly damaging him. Luckily lance is only my 2ndary and I have a primary hammer which does well against both monsters.