billd91
Not your screen monkey (he/him) 🇺🇦🇵🇸🏳️⚧️
I'd be kind of mystified about any rule, house or optional from a 3rd party source, that allows you to ignore a flanking opponent without using a concentration check of some sort. Seems to me that the concentration skill would be ideal for determining whether someone is capable of focusing their concentration enough to ignore a flanker. The DC could be 10+HD of the ignored creature... or something like that.