Thanks for the help! Yeah I guess I'll have to just learn to not be so impatient. I did a bit of reasearch of my own and found out that others have similar issues to mine (and the first issue you described with Fire 4 where Swiftcast is not used on Fire 4 but the spell after it). Appearently it's caused by the ping being too high because with server-side checking for some skills more than others, the game isn't registering that I have the Astral Fire buff from Flare, or, in the other situation, the Swiftcast buff up, before the next skill is hit (Transpose / Fire 4). Well, at least that's what other players said and it seems plausible, so until the new European datacenter is finished, I'll just learn to wait

I have no idea though why Fire 4 is not available for you right after using Swiftcast, because it should work without it anyway, just, well, take longer to cast. So that might be an issue that has nothing to do with lag.