[X] Refuse his Request. If you depend upon someone else again, then you'll only be weaker yourself. You'll have to be stronger than ever now, and you can't gain that power with Sparks. You refuse to die until you've had had your revenge and your family has been rescued. Irregular data or not, you'll just have to digivolve and prevent that fate from occurring.
[X] Pledge to Sparks that you'll join him to delete Count and his servants. After all, you were planning to delete them all anyway. However, point out that Lunamon and Thresh are still alive. The two of you need to save them as well, and if you don't make it with whatever time you have left... You'll need his help to do it.