I am still in the dark as to why you call this a Clear Skies team, but nevertheless I am going to rate it. The thing I notice right off the bat is that you are running wierd spreads. Small amounts of HP EVs won't do too much as far as cushioning hits I'm afraid, so you might as well just invest them into other stats. You appear to be going for some bulky sweepers but THB some of the things you are running kind of let that down.
Tyranitar - Shaddap Erick :P. DD Tar is boss. I do not, however think it will work with that spread. Everything else looks good, but run Jolly Nature and go for this spread. 52 HP / 252 Atk / 200 Spd. This is the spread I used to use on DD Tar and it works well if you can play it the right way. At the beginning of the battle, Tyranitar should be used very conservatively. Usually you will want him to set up your sand, and after that, only come in when it is neccassary, as if you lose Tar you lose your weather, and that's bad. The time to bring in da Tar and set up is late game. Come in when another of your pokemon has been killed and the enemy is something you can set up on, then sweep. If you play it right, Tar can be a rather effective setter and late game sweeper.
Keldeo - I don't know why you have those HP EVs, put them into SAtk, and give him 4 HP.
Latios - Once more, I don't see what you have set out to accomplish with your HP EVs, but I advise you put them into SAtk, and perhaps give Latias a Life Orb. Life Orb Latias is my favorite set for Latias as it hits very hard, has good coverage, and can take more than a few hits. Replace Draco Meteor for Dragon Pulse. I know that the power is nice to have but as Erick said, Latias will be able to do so much more with his SAtk not suffering from the Draco Meteor drop.
Heatran - Change his spread to 248 HP / 252 SDef / 8 Spd, and give him Earth Power over Stealth Rock, allowing him to take on other Heatrans on the switch as Erick noted in his comment.
Landorus-T - You lack a physical wall, so I think I am going to make Landorus that wall.
Landorus-T @ Leftovers
EVs: 244 HP / 64 Atk / 200 Def
- Stone Edge
- Stealth Rock
I've used this Landorus a few times, and it has the bulk to easily take fighting type moves aimed at Tar and Tranny, along with many other physical hits. Intimdate boosts his bulk significantly and he is great for setting Rocks, as he can come in on somehting like Terrakion, which it threatens massively, and use Rocks on the switch. U-turn removes the occasional Espeon trying to bounce back Stealth Rock, and EQ and Stone Edge get nice coverage. 64 Atk may not be much, but with his massive Attack stat Landorus-T is still at somewhere between 320-340 Attack with just 64 EVs, which is very impressive, and allows him to do a but of sweeping, crushing the things that he walls.
Rotom-W - You need a scarfer brah.
Rotom-W @ Choice Scarf
EVs: 4 HP / 252 SAtk / 252 Spd
- Hydro Pump
- Volt Switch
- Hidden Power [Ice]
Rotom-W is quite the menace with a Scarf. STAB Hydro Pump hurts, and Volt Switch makes him great for scouting, revenge killing, and forms a nice Volt-Turn Core with Lando. Hidden Power [Ice] takes down things like Breloom, Dragoninte, Garchomp, Salamence, and other such things. Trick screws walls and maybe allows you to get some Lefties for reocovery.