Basically, yes. Using a female Pokemon to breed will always have a higher chance of the offspring inheriting the mother's ability. I did this with Huge Power Marills, and 4/5 times the offspring had Huge Power because their mother did.
As for items, as long as a Naughty Seedot holds the Everstone and the other Seedot holds the Destiny Knot, 5 IVs are guaranteed to pass down. As for egg move, as long as either parent has Defog, the offspring will have Defog.
However, if you get 2 Seedots that you bred, you will get less eggs appearing at the day care. Just remember that Pokemon with the same OT produce less eggs.