Well, you did just beat their initiative, so I'd say yes. I'm not sure if you'll catch both of them in the fireball blast. I'll say make a successful Spellcraft check (DC 15) to time it just right. If you're off, fail by 5 or moe, you can only get one. Roll a 1 and 1d3 of the PCs get caught in the blast.Is there room and opportunity to catch both of them in a fireball?
If not is there an opportunity to secure a web to two walls or wall and ceiling and catch one if not both?
Okay: Rolled 9+7=16If it at any time hastens the flow, feel free to roll such for me. Invis doesnt work on my phone so I have to wait till I get home to roll myself