Very interesting! And no worries, it's all good, rush.

I think Cascade is going to go where she's needed most. So she's got the DC 15.

I'll edit the rolls here. 

Attack Roll: [url=https://www.roleplayerguild.com/rolls/24776]14[/url] (Could I use a spell slot here to boost this? ^^")
Athletics Skill Check: [url=https://www.roleplayerguild.com/rolls/24777]27[/url]
Charisma Saving Throw: [url=https://www.roleplayerguild.com/rolls/24778]26[/url]