If you fight a Razorclaw make sure your level is at least lvl4, with a Ninja. Keep spamming 
spin tactics. Then use a powerful weapon (I recommend fire, althought it causes a berserk 
attack that deals 100+). Because of the 180% fire damage just try to survive. Try a super 
psycho sabre lvl 50 for that (i've tried it. Just spam spin tactics).