It depends on the HP of the unity, and the amount of stacks. The more overall HP, more temptress you need or the shorter will be the time you take control of that stack.
For more detailed explanation:
https://www.lordswm.com/forum_messages.php?tid=2049144
There is also a calculator to help with it:
http://daily.heroeswm.ru/newscom.php?i=new-tools-part-3 |
