alot of characters have semi Brv==>HP combos..
some actually have legit combos that can't be avoided if the Brv connects without a full EX bar
while other have more situational Brv==>HP custom combos
custom since those attacks are loose Brv combos and loose HP attacks
Squall may have on once in a while with his aerial combos if done close to the ground, into Aerial circle
like I said: situational, since it can be avoided sometimes.
some attacks do leave someone with enough stun to activate an HP attack
try Squall Fussilade in the air..and then use aerial circle close to the ground
usually , if times right, they can't escape..