This list has a much lower chance of winning than 99% because it is all over the place. I don't mean to offend, it's just there's a lot of things that you could improve on to make your army more effective. Okay few pointers for you:
-don't give your commander a flamer, he shouldn't be needing it. I usually give mine iridium armour, cyclic ion blaster (taking advantage of signature systems) and a plasma rifle, or two plasma rifles like Da Stormlord suggests. Another thing to consider is giving him a drone controller and a target lock with two marker drones. If you do this, give him 2 missile pods to complement the range of your drones. You get to fire the drones at a separate target because of target lock and they're BS5
-don't take bodyguards. If you have an elite slot free, you can get the exact same thing for 10 points cheaper per suit. Also, don't put a flamer with a missile pod, that's silly. One is template range and one is range 36. Fit each suit with two of the same weapon - everyone on this website who knows how to play tau will give you this advice. If you want to know why, just ask
-if you want to use an EMP fire warrior suicide squad to take out an enemy tank then here's how to set it up. 6 fire warriors in a devilish with EMP grenades. Only one individual can throw the grenade so you want the bare minimum squad size seeing as you have to pay for every member even though you can only throw one. Expect this squad to die as soon as you've zoomed them up the table and they've had a pop at the tank.
-fireblade needs to be with a squad of 12 to be at maximum efficiency. They're pretty good for sitting in cover in the back field or on an objective and just lending some long range support to the rest of your army. Just make sure they aren't out in the open. Your fireblade can also split-fire his markerlight, which hits on 2s, don't forget this
-never get the shas'ui upgrade for fire warriors, you can use the points a lot better
-never upgrade your pathfinders, they are for one thing only and that's markerlights. Make sure they're in cover and use them purely as a marker source. Also, use teams of about 5, which will get you 2-3 marker hits each. Basically, if you remove the upgrades on your unit of 10 and split them into two teams, you can mark up double the units and save 45 points (I'm assuming you mean they have rail rifles). Crisis suit plasma rifles are your best source of str6 ap2 weaponry. Also, you can consider dropping one of the 5 man teams if you use marker drones with the commander - you don't want to end up with leftover markerlights and not enough firepower
-if you're ever going to use kroot, don't get a shaper, they're too expensive for what they do, spend the points elsewhere. Also include one hound with them because it gives the whole unit acute senses so they get the best possible positioning. Sniper rounds are also a pretty good upgrade for kroot. Just make sure you have them in cover if you can because they're very fragile.
Having said this, I think you already have enough troops for 1000 points. Make room for a couple of broadsides! Or some more crisis suits. You have a bit of a lack in ways to deal with high armour value targets. Dual fusion blaster crisis teams are good at this.
-piranhas are alright, but having only one isn't going to make much of a difference. There is however a great trick you can do with piranhas. It involves your suit commander and 5 piranhas (or less, but 5 is best for this). Again, just ask if you want me to elaborate.
Hope some of this helps
1500 pts
2000pts