So, do you feel lucky, punk?

[1337 h4xor]

a few things, making it auto crit is way too powerful... Free crits should never be handed out.

second you cant ready actions before combat and you cant use a partial action to ready an action. Ambushes are deadly enough already with everyone being flatfooted and opponents being able to get perfect placement in the first round.

 

[Saeviomagy]

By my reading of the rules, you never lose any of your saving throws, even when helpless.
HOWEVER
Your dex IS treated as if it were zero, so you do incur a nasty -5 penalty on reflex saves (instead of your normal bonus) for being asleep.