Both teams have an unchanged squad & no changes are expected for this game except some bowling rotations as per the conditions. (Unlikely though)
For small leagues, you can opt for Rossouw & Nash.
1) Hampshire top bat: Bailey at 5.5
2) Sussex top bowler: Jordan at 5.0
3) Sussex top bat: Taylor at 5.0
4) Most economical bowler of match: Afridi at 4.5 (N/A on bet365)
5) Hampshire top bowler: Topley/Abbott at 3.75 & 4.5
You can choose any of the above picks as your cap & vc.