For iPhones and Android I think Kings Group is amazing for multiple farm accounts. However if you ever want to sell your account I think KOA would track and prevent that.
FIRST!! Make sure you have bound you main Account to Play Centre, Game Centre or your Facebook.
With Kings Group you can bind 6 accounts to one email address, switching is very simple:
Click profile- settings- account- switch account- Kings Group Account- type your phone/email/account- entree your password and type the 4 fidget CAPTCHA. then you can choose between you 6 accounts. if you have touch ID this is even easier ;)
What you need to reach SH16 and to reach floor 5 of the spire:
What you need to buy:
- $5 USD purple Iseult's Equiptment Pack. this will help grow the farm to SH 16 fast but also gives you the 16 gem slots you will need. This makes it very quick to push a farm
- If you don't wish to spend these are the rss and requirements you need to push the farm up: (Thank you Drokan for making this table)

What buildings you will need to Prestige Banner too Level 15:
- Wall- Infantry Damage Received
- Embassy- Cavalry Damage
- Watch Tower-Bowman Damage
- Wishing Well- Cavalry Damage Received
- Trap Factory- Army Damage
What level Valor Gemstones you need:
- Attack Gems:
- 3x Level 5
- 1x Level 4
- Health Gems:
- 4x Level 5
- 2x Level 4
- Defence Gems:
- 2x Level 5
- 4x Level 4
To obtain Prestige Banners I collect them from Alliance Celebration Chests and then I use excess Prestige Banners trade them in the Spirit Store purchase Raw Valor Gem Fragments and Refining stones to level up the gems.
At SH 16, unlocking the spire, reaching floor 5, gathering on floor 2 and resetting 3x a day, you can collect 1million Iron, 125K silver and 500k food a day. With 6 farms 6 million Iron, 750K Silver and 3 million Food a day. All in items.
Also spend $1 on Thrusdays to get an extra 5.2 million food and wood. Buying that in 6 accounts thats $6 for 31,200,000 food and wood every week. All in items.
Solo Barbarian Rallies:
Equalising your main SH's march and sending one cav troop from your farm account can (at this time barbs lv 21) can get you 400k resources x5= 2 million resources every 5 barb attacks.
Also spend $1 on Thrusdays to get an extra 5.2 million food and wood. Buying that in 6 accounts thats $6 for 31,200,000 food and wood every week. All in items.
Solo Barbarian Rallies:
Equalising your main SH's march and sending one cav troop from your farm account can (at this time barbs lv 21) can get you 400k resources x5= 2 million resources every 5 barb attacks.
(Farms for me are still a work in process as i enhance them such as buying rss production equipment, pushing internal farms and levelling them up too SH 20 to unlock floor 10 of the spire, i will update this page)