Trapping your th is a th outside base makes no sense. !!
First off , clash how you want... So if you see a reason to trap a th that is way outside your base , go for it ... I just don't see the logic . Consider that with respect to the townhall there are really only two types of bases
1. Townhall protected ... Townhall is within range of visible defences ... And here I include all forms of teaser bases where the th might be outside of walls but still defended
2. A true th outside base where none of the visible defences can assist the th at all.
the logic of the th outside base is pretty clear .. The owner doesn't care about trophies so much and is willing to surrender the victory . This easy victory is available to any attacker ... Including the incredibly weak and can grant the defender a shield before a strong attacker comes by the loot the base of everything...
Trapping the lonely th just increases the attackers cost for the victory.. So other than the giggles of putting them to added expense , is of no benefit to the defender.
But there are disadvantages to the defender. Consider the mindset of a typical attacker . When raiding, I typically have a full army . I don't " next" to find townhall snipes but will accept any offered for the loot win bonus ... This might be a snipe alone or as part of a full Attack on the base if the loot and prospects are adequate . Consider each scenario
... If I have decided on a full Attack, trapping the th is pretty useless .. It just removes defences from the loot I am really after
if I decided the loot was not worth it , I will drop my exploratory single archer on the th ... .. Some traps are revealed .. I will now do one of three things
1. Surrender ... My assessment was your base wasn't worth raiding . You have cost me an archer ... I move on . Defender could have gotten a shield but now might instead get a full blown looting Attack
2. revise my assessment ... With traps out there ... Base is worthwhile . May drop a couple more scouts before you face a full looting Attack ... Attacks are way easier if the traps are out by the th
3. Sometimes just decides to cost the defender. Trapping the th seems a petty move designed just to cost me resources so I can and will sometimes be just as petty in return... So maybe I just trigger and kill you cc troops .... Depends how petty I am feeling ...
bottom toms line is that the only reason I can fathom to trap the th outside is just to cost snipers more resources . On the other side is the greater base vulnerability to looting and the greater likelihood that one will face a full looting attack as the defender has rejected the idea of a free shield in return of allowing someone an easy victory .
But as I say ... Clash as YOU want . But don't be shocked if an opponent decides to loot you to 39percent and then suddenly surrenders... In fact , if you are a th Trapper , you should applaud that move .