CAMILLA

Jump back to the ledge where the door was when you entered the chamber. Equip the DSS combination that gives you 4 ice balls that will circle around you to protect you against her poison bubbles. When Camilla comes near, throw the crucifix and whip her a few times. When she goes to the far right, jump to the platform directly in front of you. If she uses her beam at that time, it should miss you. Repeat this process and you will defeat her.

HUGH

This has to be the easiest boss in the game. Equip Uranus and Manticore which will summon a poison cloud. Whip Hugh a few times and the poison cloud should cling to Hugh which will constantly damage him. Then, Roc Wing up the right wall, where there should be a ledge there. Just stand there and let the poison cloud do the work. In a matter of seconds (or minutes), he will be defeated.

If you want, you can have some fun with him and run around the room to get him to chase you. If your health gets low, jump onto the ledge and use the Unicorn summon or any other healing combo/item you have.

NOTE: If you don't have the DSS cards, just use the DSS card trick (pick any two cards you have, and activate it. Nathan should glow right after you press R, but before the card activates, press start and select the card that is two cards after Neptune, and use the Manticore card.)

DRACULA

FIRST FORM: You can use any strategy you want and you should beat him. Go to www.gamefaqs.com for more details.

FINAL FORM: For this form, his chest with the eye is the only place that you can hurt him. Jump onto the platform, then use the Cockatrice summon (Uranus/Cockatrice) and summon  it by pressing down, right, up + attack. Use this whenever he attacks, except when he uses his poison bubbles. Spin your whip to destroy the bubbles, then attack his eye with your whip or crucifix until he does something else. Repeat this, and after a short while, he will start glowing and he will charge across the chamber. At this time, use the invincibility (Pluto/Unicorn) combo, so  he can't hit you. Just wait and he will turn into an eye with bats circling around him. Use the thunderbird summon (Uranus/Thunderbird) to damage him. Then he will charge at you again. Turn on the invincibility to avoid damage. Repeat this process and he will die in no time.

I suggest you stock up on some Mind Restores and Spiced Meats since you can take some damage if you're not that good, and you will be using a lot of MP.