So the arreat summit has a page on casting delay where they write: "Tip: While you're waiting through the Casting Delay you can switch to another spell and use it while you're waiting for the first skill to be available to cast again. Example: Cast a Fire Wall (Casting Delay), then quickly switch to Static Field (No Casting Delay), then switch back to Fire Wall again.Once you get your timing right you can constantly cast spells even with a Casting Delay on one or both of them. Casting Delay spells are connected, such as the Druid's Armageddon and Hurricane, so you may not be able to combine two of the same Casting Delay spell." I was going to make a FO / Hydra sorc, but reading on forums I understand they share the casting delay. Is the phrasing just misinformation, or are there actually skills which don't share the casting delay?