That's why u wud be better of with the defensive troop buildings, like the war cathedral or the summoning circle
Def twrs give you permanent def, so even with low troops your def twr prevents the 1st 8 atk items from getting through, or the 1at 6 spy atk items. To each his own. The War Cathedral and SummCirc provided an additional 5% to ally bonus The Beastiary and War Aviary gives additional troops, so you can atk 2x more all these atks are against an OSF btw