Oh and just to clear this up forever, Annihilus never tanked Galactus' blast head on. That's a myth. The only thing about the scene that's up for debate is whether or not he was trying to get away from the blast, or was flying towards it when it happened. But what's not for debate is that he was shielded.
Galactus lifting up the containers that Annihilus was using to siphon the power cosmic.
http://i1215.photobucket.com/albums/cc513/dmills31/1315336090027.jpg
Annihilus looks at this, realizes what's happening and (bottom left panel)
holy shit, I'd better get the phuck outta here! Flying away with the golden protective hue of guess what...The Q-bands!
http://i1215.photobucket.com/albums/cc513/dmills31/1315336105376.jpg
Looks on from a far...
http://i1215.photobucket.com/albums/cc513/dmills31/1315336971286.jpg
Meanwhile, nearby
http://i1215.photobucket.com/albums/cc513/dmills31/1315269907386.jpg
Crawls out from the rubble, guess what? Protected with the golden hue of the Q-bands...
http://i1215.photobucket.com/albums/cc513/dmills31/1315337645060.jpg
Holy shit, well whudda ya know, we ended up right next to each other. Guess this was fate.
http://i1215.photobucket.com/albums/cc513/dmills31/1315337659104.jpg
So yeah, no. He never tanked that blast head on unshielded. If he gets to use the weakened excuse, so does Rider, since he's the one that was battered and bruised by the amped Annihilus, yet still pulled it out. No pun intended