I have played Sally EX in this year format. I think it is too slow to set up directly. There isn't any real way to consitently set up, and attack with Sally EX and discard 25 cards from your deck. 5 KO's (6th doesn't matter), means 25 cards discarded from deck. I have had it in fun red face paint typholion decks, but use it as a "closer" to KO nasty stuff.
That Togekiss/Delcatty build might work but I honestly don't see the consistency there. Also, when you run it as a primary attacker, it will get KO'd by a counter attack Gallade.
Even as a 1-0-1 tech it can work, but most of the better decks now, run a very fast CLAY-BALL engine, and that means you cycle through your deck fairly quick. Thus when you start discarding 5 cards, it might deck yourself KILLS you.