Lucky Dags is a single-target enemy, which makes it very easy when on its own. However, it compensates for this with very high damage and a rapid attack rate, meaning that any cat that gets hit is a lost cause. It is particularly dangerous when stacked, like in Sins and Blessings, where the many Lucky Dags attack faster than you can spam cats.
Make sure to spam meatshields at all times. You can prioritize the cheaper ones because Lucky Dags basically one-shots everything. Using high DPS units is a good idea, because Lucky Dags can't hit them even if they are in its range. Fast units such as Valkyrie may not work when there are multiple of them, because immediately after the first group of meatshields die, Valkyrie charges ahead of the second group, getting killed instantly.
Time between attacks
380 (single target)
*In each stage, there is strength magnification, the value of health and attack power varies due to this value.
*Time between attacks is the time of the attack from the motion end until the next attack motion start