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
Stall the game to a crawl with Sanctuary in the Sky and Anti-Spell Fragrance. Get out Cloudian - Acid Cloud, Cirrostratus(maybe Altus too) and 1-2 Squalls(maybe Storm Dragon too), set down some Sanctuary Counter Traps and proceed to wipe opponent board then hit them with 30K+ ATK Nimbusman.
Features Deck Search aid with Pot of Duality, Zeradias, Parshath, and Gold Sarcophagus(for drawing Cloudian Squall mostly but sometimes Divine Punishment).
This deck could be further optimized by speeding up the Lockdown setup and removing Eye of The Typhoon and maybe Nimbusman
Sanctum of Parshath is searchable by Celestial Knightlord Parshath. You use it to recycle Divine Punishment. After Divine Punishment is used you can for example switch one of your unneeded Cloudians on the field to Defense Position to destroy it. Then activate Sanctum to refetch Counter Trap. Smoke Ball can help with the exact 3 requirement as it's frequently in the GY.
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) and after that you can fetch either Divine Punishment or any Cloudian(this is golden).
Herald of Mirage Lights - 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.
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.