The problem with Ice Parry, is that a lot of good players will kind of expect this now, and often do naked jumps to punish you when they hit the ground. This can kind of work to your advantage because you are more likely to AA jap or uppercut on reaction into slide. I like to use parry to interupt pressure strings and certain teleports. Once you start ice parrying Scorpion, Mileena, Ermac, Smoke teleports, they'll respect it and be far less likely to use this on you.
What makes CSZ quite unique is that you should use his specials sparingly. I like to abuse divekicks, however a character with a fast charge special can punish this.
It's his bombs you need to fully exploit. For instance, you can 21 into close bomb. Here you have one of two options. You can block and see if they commit, and punish after. Or you can continue pressure, dash, and do 21 1+2. If they remain blocking, the 1+2 will connect with bomb and they will be launched. While im not a big fan of X Ray combos, if you do this, you can jump kick then X Ray after the bomb and 1+2 for a 50% combo. If they block your 2,1 and now think you are going to throw a bomb and are waiting to interupt you, you can instead do his 1+2 which is his launcher. Even if they block this, this is safe on block.
F221 cancelled into close bomb is a nice pressure tool as the string staggers them on block and the bomb will appear between you and the opponent.
CSZ also has a nice "glue trap", something I discovered on the TYM site. If your opponent is full screen and you have X Ray, try this. Throw a far bomb, then jump and X Ray. They will either jump and the X Ray hits (36% damage), or they block, but your blocked X Ray pushes them onto the bomb. Here you can do a njp, U4, slide. This does 34% damage, but you get an extra 2% chip damage from the blocked X Ray, so whether they block or jump, you are guaranteed 36% damage. Now, this is not a 100% guarantee. A lot of characters have many specials to help them get out of this, especially those with a quick teleport or a full screen Ex special.