sleep training

Hi so I need some advice on sleep training; my son is 10months old just turned today and ever since he hit 9months he has been going through horrible sleep regression has gotten a little bit better but when he's teething horribly he regresses back to waking up every 30mins-1hr without teething gotten down to waking up only once; so my husband wants me to sleep train him but he works nights isn't here to help and though at 10 months with my first who is 12 now everything went smoothly to train him he was a very easy baby second not so much so I did the cio method I'm asking should I try it again would that help with the regression any other methods besides cio