you jsut answered your own question without even knowing it. The defensice value of the LS wall will only be the same as the bir wall if the LS player is low moral...hence the word 'strategy'. sacrifice a players size to protect big players troops, wow, fancy doing that.
You're already so far behind in your reasoning and argument here that you'd be best either quitting now or even better, request this thread be deleted to avoid it being used against you in the future...it just displays compete ignorance and incompetence in the game. Like your name says, get back to basics before you try to compete with the big boys and girls.
lemme tell you something real quick...
these days you have far more MORALE worlds than non morale worlds, do you know that vast majority of players do not attack cities/players on which they would have 80 or less morale?
do you know that maybe 1 in 100 players would actually attack 900 or 2k ls in a 30 morale city?
there is literally nothing to be gained by doing that because in 90% of the cases you can clear more birs and get more bp than hitting someones stash in morale city, not to mention the amount of res you need to rebuild your ls nukes for clearing someone elses ls nukes, its dumb..
as for stashing units in low morale cities, its really common, in almost every conquest world i place bir trips in 300-1k cities to know when enemies favor farm them and which ones so i can stack them with dlu, and result is EASY DBP for me with minimal losses because morale hurts and it doesnt matter if their wall is 1 or 0.
im not with or against back to basics about this topic, LS were always supposed to be used in attack and have crap defense if lost at home due to being caught offline or whatever while birs were used primarily in defense or clearing fire ships, been in the game since 2010 to know how the game works and how the underlying "strategy" and "mechanics" are supposed to work, i would prefer if i didnt need to spend 150 ls to clear enemy ls nuke but then again i can almost demolish 700-800 birs in one smash if i fully buff my single ls nuke and get greater return of bp in short term.