Yeah, it´s the easiest next to Chapter 1, but it still takes time, at least for me. I can chain most of the enemies, but I usually break the chain somewhere, and I need to kill all the bosses without losing lives... At first one I usually make stupid mistakes changing from a face to another, at second one I totally suck, and if I have any lives left, the third one manages to take them from me.
I know it isn´t that hard, but I usually do mistakes here and there... And I´ve only played 7 hours ingame, I hadn´t played it before, so it takes some time to improve at concrete parts of the game, even watching exactly what you have to do.