Flame Dance Tenki can add Kaust to your hand, as well as you can use Yushi on the deck if you are with 3 tenki, so you can destroy any tricky monster you opponent could summon, however, Kaust is too usefull to be at 2, as flame dance can add him to hand too, reinforcement of the army can add Pollux to your hand, basically, Reinforcement of the army and Flame dance Tenki add Concistency to your deck.
In my opinion ghost ship is not good enough, basically you could do better with a third Kaust, kaust is aways the best target for Pollux/Gredi effects since if you use him you can XYZ a rank 5, and yeah, a rank 4 too if you wanna.
Most important of all, where is sombres on this deck? he is probally the best draw of the constellars when you already have constellar monsters on the graveyard, is like Verz/Lswarm deck without Cecylon, he is way too good to be out of the deck.
In my opinion constellars aren't so good with traps, I'd preffer just to put a Decree and the solemns, maybe Safe Zone for when you don't have decree, Pleiades is already a "Monster Trap" with his Compulsory Evacuation device effect, however, trap stun can do it too if you are thinking about a really fast deck.
Main:
-1 Antares
-2 Eska
-2 Ghost Ship
+1 Kaust
+1 Yushi OR Ensho
-1 Hawwa
-2 Schet
+3 Sombres
+3 Flaming Dance - Tenki
+1 Reinforcement of the army
-2 Constellar Star Chart
+1 Mystical Space Typhoon
I'd also remove some traps for hand traps, the solemn trinity would also probally do better there however, but yeah, if you don't like the solemn trinity/Decree then I guess it is your style.
Extra(Not doing a list, just some Ideas):
1: Constellar Ptolemys Messier 7 (Just... way too good.)
2: Tiras Keeper of the Genesis.
3: Gaia Dragon.
4: Radiant Photon Paradios (Can get you out of tricky situations, since constellars are light, way too easy to be summoned... also you don't even need corn when using it, the draw when it is destroyed is nice too.)
5: Number 61: Volcasaurus (in case you decide to use Gaia Dragon.)
6: Shock Master (Too easy to summon.)
7: Maestroke of Symphony Djinn (Just... aways good.)
8: Zenmaines (This Leonis + Sheratan Combo, Zenmaines is just way too good.)
9: Leviair (Maybe? Sombres will banish your constellars eventually, so you may use it to get it back if you wish.)
10: Adreus (Just in case you don't use Gaia Dragon + Volcasaurus, because Volca + Gaia is just better than adreus if you are thinking about a fast deck... way better.)