Take your time killing the Moas. I HIGHLY recommend running to the middle of the platform you start on when you get attacked, and wait for an opportunity to downward/upward thrust them. With the moas out of the way, you won't be falling in the lava and getting your butt kicked by them while fighting a Lizalfos.
And if you're having Lizalfos trouble, you can use the Iron Knuckle trick to kill them. It often helps to duck in the air and slash, though. Doing the Iron Knuckle trick except ducking will usually get them.
Also, if you're low on lives, and there aren't any Link dolls left, go into the forest around New Kasuto and get attacked repeatedly by the "easy" enemies. (You know how when you see enemies in the overworld, some are little bot-looking ones, and others are monster looking ones? Go after the little bot ones.) In here, you will face two spiders and two orange Lizalfos, both of which are quite easy. Orange Lizalfos are worth 150 Experience Points each, and the Spiders are worth 5 each, for a grand total of 310 experience points per round. If you need to heal, you can just go into Kasuto and come back.
Hope I've been helpful.