I don't think radiance ever stacked. Immolation items don't stack in warcraft 3.
Immolation did/does. Radiance didn't.
sunfire cape+invis=instant win
© 2013 Riot Games, Inc. All rights reserved. Riot Games, League of Legends and PvP.net are trademarks, services marks, or registered trademarks of Riot Games, Inc.