Cloudians are fun archetype that I main, but it has been forgotten(no new cards since 2009). So here is me giving my best to make them rogue.
Side Deck Heralds are for flavor not functionality, because I like this archetype. Final Attack Orders is against effects that turn Cloudians to Defense position(like Level Limit - Area B).
Deck Master: Cloudian - Eye of the Typhoon
The point of this Hard Lockdown Deck is such setup:
Parshath on Extra Monster Zone
Cloudian - Acid Cloud
Cloudian - Cirrostratus
Herald of Mirage Lights / of The Arc Light
Cloudian - Turbulence
Sanctuary in The Sky Field Spell
1-2 Cloudian Squall(one could be enough as Sanctum can recycle Cloudians then you Normal Summon them and they will have some Fog Counters)
Sanctum of Parshath
1-2 Divine Punishment
When you fetch the needed cards you can replace Parshath for Eye of The Typhoon or Nimbusman as beaters.
When you have such setup you can negate anything with Divine Punishment or Herald of Mirage Lights. Sanctum of Parshath lets you recycle the Divine Punishments and the Cloudians you discard to activate Mirage Lights. if Mirage Lights is destroyed by battle which it frequently will be Sanctum can return it to Extra Deck so you can spawn him again with Smoke Balls(generated by the Turbulence you have on the field).
You can also turn your Cloudians to Defense Position in order to destroy them and recycle them with Sanctum. Then you can Normal Summon them again and they will gain some Fog Counters on top of what Squall gives them.
Note: You can't destroy face-down cards with Acid due to Sanctum but you can just attack and negate anything so it doesn't matter.
Features Deck Search aid with Pot of Duality, Zeradias, Parshath, and Gold Sarcophagus(for drawing Cloudian Squall mostly).
Newest Extra Deck Additions:
Celestial Knightlord Parshath - Grade A card in my deck. Costs 3 Smoke Balls. First you fetch Zeradias if Sanctuary in The Sky is not on the field(fetch it and not Sanctuary in order to thin the deck). You should also search for Sanctum of Parshath to enable the negating loop. After that you can fetch either Divine Punishment or any Cloudian(this is golden).
Herald of Mirage Lights - Very Good card in my Deck. I used to run test build with Herald of Ultimateness in my Deck(To get opponent into 100% Lockdown). It was too slow so I thought this could help. It helps with Counters that could disrupt Cloudians extending the 3 Divine Punishments I have. You can use the Ship and its derivatives to protect it. If they attack it then activate their cards undisrupted by Mirage the Ship will hit them for a lot of damage. If they don't attack that way you will have additional line of negates with Mirage.
HIDDEN BOMB: Timelord Progenitor Vulgate - I found a really OP trick with this card. His effect reads when it battles at end of Damage Step banish all opponent's monsters and at End Phase return them to the field. You can negate his second effect with Divine or Arc to make opponent's whole front row STAY IN BANISHMENT. Rinse and Repeat because you can recycle Orange to make Arc and also recycle Divine Punishments.
Side Deck:
Here I have featured some cards that I have found useful to the stall strategy. Heralds are for flavor.
Final Attack Orders is against effects that switch Cloudians to Defense Position causing them to self destruct.