Favorite specialist to run smokes on?

Some talk here about Rao here so I'll offer some thoughts. I know this topic is about smoke, but I'll lay it all out. I have about half my total playtime with Rao (200hr+ as Rao). Some notes on his abilities:

• Hack range vs infantry, land vehicles and enemy gadgets is 100m.
• Hack range vs air vehicles is 200m
• Hack vs infantry has been revised several times.  Currently a successful hack on infantry gives you the red silhouette on the hacked player + any other enemies with 20m or so. (There is a rare 1% bug that will reveal enemies way outside this range). If I'm on a contested flag with multiple enemies I'll try to hack the first player I spot so I can see where her friends are hiding.
• Hack works thru smoke.  For targets partially in cover you need about 40% of their body to be exposed in order to hack. (Can't hack some looking at you through a window).
• Quickly flicking the hack around open/hot/suspicious areas is effective at picking up enemies that I otherwise would have missed. You get the instant feedback when you pass over someone, just a flick is enough to cover a huge area.
• When the hack tool is equipped but 'idle' and you pass over an enemy you get a thin red outline - it's a different effect than a successful hack. Good for 'seeing' enemies thru smoke without altering them they've been hacked. Also good for seeing where a tank is sitting in a smoke cloud so you know where to toss your nades.
• Hack shuts down Ranger and Casper drone for ~5 seconds. Drones just hover making for an easy kill, great vs those evasive Casper drone users.
• Hack will remove landmines.  For the prime mining spots you can do a quick sweep to detect any mines along a 200m stretch of road and 'remove' them (generally just shooting one is a faster removal method).
• Against land vehicles I like to hack, wait for the recovery, toss EMP nade, wait, toss 2nd EMP nade, wait, hack again.  4 consecutive disables. Can occasionally get people to abandon vehicles doing this.
• Jets are very difficult to hack on controller.  Much easier on KBM.  Hacking air vehicles doesn't seem to be terribly helpful. The 'designation' feature is a joke.  Main benefit is getting them to dump flares. Very rarely you can get them to crash or make them an easier G-84 kill. Hacking an air target that's engaged in a dogfight is a fun way to tip the balance.
• Hacking a stealth heli will force it out of stealth mode.
• His passive ability that silhouette spots enemies who have damaged him is also triggered by Boris's turret.  If I'm on a contested flag I'll intentionally let any turrets hit me so I can hunt down its owner.
• Hack tool can open and close doors at range.  Never found this to be very useful.
• Any passengers leaving a hacked vehicle will automatically be spotted when they exit.
• Aggressive hacking has its drawbacks. 20% of my deaths are likely from being distracted while attempting a hack or simply being too slow to switch back to my primary.