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
Cloudian - Turbulence
Sanctuary in The Sky Field Spell
1-2 Cloudian Squall(one is enough as Sanctum can recycle them you then 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 and Cirro 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:
Relinquished Anima - Only costs 1 Smoke Ball. Used to get rid of a nasty monster by equipping it to this card. If the monster was strong you also get a beater.
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. And you have 2 negates per chain alongside Divine Punishment.
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.