Foresight makes you never flatfoored. Celerity has immediate action casting time, which means any time, even during someone else's turn. However, if you are flatfooted, you cannot cast immediate action spells, and you are always flat footed in a surprise round/before init.fbmf wrote:You have my undivided attention, Sir.(except for specific Celerity shenanigans)
Game On,
fbmf
So basically, Foresight allows you to be in a hypothetical situation "Oh noes, that party of assassins all arranged to go attack at once to begin the battle. I use Celerity, Time Stop, am dazed for a round, then proceed to set up elaborate traps and/or Gate in a Solar, disguise self him as me, and then Teleport away, and then they all get to fight a disguised Solar, and even if they win, I'm Superior Invisible and watching them do it, attack them one at a time."
Frankly, I think you are better off just Shapechanging into a Dire Tortoise all the time if you are worried about that.