hp or defense first?

[quote=LoveMeBotch]I usually play the tanky role amongst my friends when we play. I've always wondered is it better to get hp or defense/magic defense first? Let's say the other team is the standard team and both teams are equally matched. Should I go for something like warmogs first or thornmail/or force of nature?[/quote]

[quote=B-Wong]Overall, after calculations HP is more efficient up to a certain point but after X amount of HP you're going to want to get Armor. It's best usually to get a mix of both (Aegis of the Legion, Sunfire Cape, Banshee's Veil) whenever you can unless you're getting thrashed.[/quote]