Honestly I find both our codex jets to be far from impressive, but of the two I prefer the razors.
The sun is practically all about the drones, who are nice and all still just easily killed drones once they take off, or forced to follow the shark's own targets if not.
The razor however, can get rear shots into enemy flyers, even us a pesudo vector strike type attack-easy rear hits on anything, and hiding someone behind a squad is useless.
But in any case, I must agree-the decoy launchers is a MUST. in fact its a must on ANY tau plane, from the razor to the tiger. its nearly as powerful as the PDF era Dpods for planes, even how many skyfire weapons are also interceptors. (and how you tend to kill the non-interceptors WITH the flyers, making many people pass on them.)
But here is a tip you might not like.
Don't play enclaves, or de-mech yourself.
You list is not a fit for it, you practically spent a tax of 35 points to troopify 2 teams of suits, while your elites are anyway empty, and you barred yourself from the powerful TE signature systems for it.
These crisis troop teams are not AS powerful as they might seem.
Sure, the 3 man squad with commander attached will mean that whatever you target with the drones WILL get 6+ marks, and them some missiles will go flying, but the 2 suit team does really little there. not to mention these teams are going to be a target ANYWAY, so making them troops does little to improve your scoring.
Then on top of it, you got a lot of points sunk into devilfishes, some of the least cost-effective transports out there, just in order to keep your theme and protect your fire warriors, who are anyway less required for enclaves.
Your choice of "codex" does not fit you list.
I know its not nice to hear, but I've been there before. so hyped about enclaves I ran lists of it despite the fact an empire list of the same army would work better due to no taxs and the godly systems I gave up (these are really absurd and we know it
Either that you brake off the enclaves and run your army as a regular empire army and take these extra 35 points to power up your guys (and maybe drop a few more bodies), or you suit up, and trade the fire warrior teams for crisis teams (dakka teams of dual BC suits and drones do wonders when it comes to S5AP5 spam-11 points over the warriors and fish nets you 3 dakka suits and 6 drones, to spawn "only" 18 inch range, but on jetpacks that got 36 of these shots, 12 of them slightly more accurate and pinning.)