The answer is very nicely written, but it contains literally not even small info how does the respawn works. First of all it's not true, that Dire Penguin ALWAYS appear in a groups of penguins. A great example is the respawn place near Chyllfroest bridge, where Dire Penguin spawns among Frost Trolls. Secondly, you can kill more Dire Penguins during one day. Moreover if we don't know the average time range - then we don't know how exactly the mechanism of Dire Penguin respawn works, right? This is the reason why I gave up answering here. Finally I don't see any proof that the respawn can not be blocked. To be sure if it's doable or not, we should stand 24/7 between respawns to be sure if floor resets have influence on its' appearing.