Blizzard Crit QuestionFollow

I'm pretty confused now after everything that I've read. I leveled frost, so I always had points in "Improved Blizzard", but now I'd like to heroic/raid some as FFB.
"World in Flames" says it increases my crit chance with blizzard. On the other hand, I keep reading that in order for Blizzard to crit, you have to have at least one point in imp. blizzard.

Sooooo.... do I still need to put that point in imp. bliz. to make use of the additional crit chance of "world in flames", or can I safely move that point out of imp. blizzard and put it somewhere (more?) useful?

Again, this is for the heroic/raiding spec, not my day-in-day-out daily spec.

Thank you all in advance for clarifying this for me.

I'm curious, where are you reading that? I'd love to go there and disabuse some people of a silly notion.

Overlord Norellicus wrote:

I'd suggest frostbolt rank 1 kiting and then ice-lancing - takes a while >:)

Thanks for clearing that up. Sorry, I don't recall where I read that - I went through a ton of sites when I started being more serious about the mage and only remembered that piece of (mis)information because it didn't line up with the tooltip. Having leveled frost, I just always had points in it and never thought much about it, until now where I've dual-specced into FFB (for bosses or raids).

I guess that leads me to the question: Should I have full "World in Flames", or move one point from it over to imp. Blizzard?