First I'd like to say I'm loving Legendary Heroes. It's heaps better IMO than FE (I still loved FE but LH is way more impressive)

I've been playing around with Gilden and my own custom Ironeer Kingdom. I've noticed that the ironeer ability 'guarded strike' has no cool down which is awesome, not sure if it's meant to be that way. However I've noticed that even though it says the unit is in defensive mode and the little shield appears above the unit, it still seems like my units are getting hit really hard. So i checked and sure enough the defense number at the bottom on the info screen hasn't changed. I double click the unit to get the full info on the unit and it says it's got 10 def but when i mouse over the stat to get a breakdown of it, it says i should have 23 def only it's pretty obvious i dont have 23 def since the guys is taking ~6dmg from a dude with 6x3 attack... he was being swarmed at the time by 2 units but i still dont think he should be taking 6 dmg...

So has anyone done any tests to confirm that the guarded strike works? I know i deal way less damage using it which is what i expected, only my guys seems to be taking way too much dmg. 

Also is there anywhere with and detailed explanation of what swarm benefits are?

Cheers