The invisible effect seems appropriate and right.
They ARE invisible to the enemy (no dex etc).
Of course in the case of the dragon it wont do much good (immune to the damage, no dex bonus and effectively can "see" invisible as it is).
I'd probably rule that even though the dragon has blindsight it would still suffer the effects of having an "invisible" foe attacking it since it is in fact ignoring that opponent. To do otherwise would constitute a flank, ie. its dividing its attention between 2 foes.
To my knowledge theres no "official" line on this one, but it would be a good one for the Sage to answer.
It could also be said that you can't really "ignore" the opponent since if they attempted a CdG you would respond, so I'd probably rule you can't ignore a flank. If you do and are willing to risk a CdG doing it then more power to you I guess.
They ARE invisible to the enemy (no dex etc).
Of course in the case of the dragon it wont do much good (immune to the damage, no dex bonus and effectively can "see" invisible as it is).
I'd probably rule that even though the dragon has blindsight it would still suffer the effects of having an "invisible" foe attacking it since it is in fact ignoring that opponent. To do otherwise would constitute a flank, ie. its dividing its attention between 2 foes.
To my knowledge theres no "official" line on this one, but it would be a good one for the Sage to answer.
It could also be said that you can't really "ignore" the opponent since if they attempted a CdG you would respond, so I'd probably rule you can't ignore a flank. If you do and are willing to risk a CdG doing it then more power to you I guess.