I have a question regarding Celerity line of spells introduced in PHB2.
Let's say we have 2 wizards, A and B. Wizard A has higher initiative roll than wizard B; neither is flat-footed; it's A's turn; wizards have lines of sight and effect to each other.
Wizard A starts to cast his Apocalypse From The Sky. Wizard B (seeing where that goes with a successful spellcraft check) casts Celerity followed by, say, %metamagic cheesiness% reach combust. Wizard A (seeing where it goes and not immune to combust effects) casts Celerity (remember, he's in the middle of the casting process already) and follows up with a counterspell.
1) Am I right assuming that several immediate actions resolve in stack (as interrupt stack in MtG) - that is, the last to announce immediate action resolves it first?
2) If yes, won't it be a problem that the counterspell goes off earlier then the spell it is aimed at? Should the wizard A break line of effect or kill his opponent instead?
3) Suppose wizard A times his celerity so he gets an action just after the B's spell is cast, I don't seem to find the right quote anywhere.
4) After the immediate actions are resolved, does wizard A get to continue his casting process, assuming he's alive and spellcasting-capable by then? If 'dazed until the end of your next turn' part of celerity is a problem here, let's assume A is immune to daze.