his aura protects him from heat, this is why he doesnt burst into flames while running faster then speeds of light in picoseconds. (human torch is out). the thing would do absolutely nothing to him but giv him momentum while hitting him for the others. anything sue brought up would be having to hold back tornados,imps,heat touches,sonic boom finger snaps, and multi-dimensional/time travelng attacks. which we all know, she can't do. now as for reeds, i don't think not even he can survive getting ran into the end of time, as flash did in his fight with death. the Fantastic 4 against flash is like 4 kids TRYING to put up a fight against a grown ass man