To have an easier time killing Baal, go to the map before Lord of Terror in Baal Castle. Capture a level 2500 Sert. Repeat a few times. Then, throw a Flamberg onto a Sert, and capture a level 3500 sert. repeat until you get a level 9999 sert. You will have to use the "Stronger Enemies" proposal about 10 times to get a level 9999 sert.

This will make killing Baal much easier.