Best way to farm walls?

What is the best way to farm walls?
Apologies if this has been posted or a dumb question ;)

You use a fast-building army that allows you to raid a decent amount of resources (at least 170-200k avg gold per raid) and that does not require you to use spells (except for once in a little while, especially if the gold available to steal justifies spending the spell). Spells are a waste of gold.

Raid a lot.

Learn to identify bases that carry most of their gold in their collectors and target them. Stagger your upgrades so they are all at least 1 day apart so that between upgrades, you have a chance to fill your storages, then dump as much as you can afford to on walls each day. Repeat.

doesn't matter which way

One-by-one because leaving yourself less gold makes you less likely to be raided. Saving up, you'll likely lose some portion of it that you would not have lost if you'd spent it as soon as you could have. HTH

stockpiling your gold to upgrade all of your walls at once will make your base much more enticing to higher leveled farmers, with high leveled troops; upgrading your walls one by one reduces the risk of gold-loss when you are not online

Farm with BAM 1200-1400.

It depends what level. 1-7 save up and blow on walls. Then when prices are much higher levels 8-11 one by one