Is it better to have more than one defence tower/ spy def tower to stop getting pinned? Or just to keep the one?
More towers = more static defense. So you should win more atks. But depending on your circumstance you could probably turn the tables on your "farmers"
At your level I hope your not getting strip farmed or pinned yet. For now, don't even use towers. When you get a bit stronger and might join a warring clan it depends on your build
You can get pinned regardless of towers or not. It just depends on the other persons strength compared to yours. Towers are like permanent defs pots
Well if you became a war only guy I would advise growing a little bit more. Try getting a little higher spy stats, and then hopefully you won't need a tower if you have enough spy def pots. With your build- high attack low defense, you might want to build one defense tower. Ask the clan admins or leaders if you join a clan.
Towers are good. Try hitting someone with no towers and one with towers hopefully similar stats and see how much of a troop loss there is.
No. Towers are bad. They are a complete pain in the arse, and mean I have to actually put effort into my rampages. Nah, in all honesty, towers are a lifesaver. If you're going to be a fighter you'll need them, you'll be in more than a few strip fights and they become invaluable.
With the popularity of hansels out there spy def towers are more useful than reg def towers. You can simply pin yourself easily.
When you reach a certain Stat, spy Def Towers at least 3-5 are best against strip wars. Since strip is more on steals, it give some defense on mid stat spies from attack builds. But still, its hard to fend off steals from pure spies and hansels. Though with full pots, even HCBC hansels will have occasional fails on unload and will use more spies to get through. Defense Towers is only good for System wars and to repel occasional attacks from BL. Keep in mind no one will attack you when you're getting stripped by the other side. They prefer to maintain you in full troops to get max steal plunder.
If you build def towers, you will need several of them for it to make any noticeable difference. However, this means you will have slightly lower stats and not have as much attack (unless you build mainly cf) also plunder will be lower than a build without def towers. All that said they do help in rwar. as far as im concerned spy towers are a must. with so many attack builds incorporating 5-10 sos in their builds, spy def towers are (in my opinion) the obvious counter. Just like regular def towers, they will give you lower plunder (towers add absolutely 0 plunder). Stat wise slighltly less overall stats as opposed to a sos but well worth it to have several.