MiniTT1 + FlexTT5 - Canon speedlight 580 EX II, 5D Markii

[Raincheck]

MiniTT1 + FlexTT5 - Canon speedlights 580 EX II, 5D Markii


I would like to try to shoot into the sun on "AV or M" mode lets say wide open F2.8 using the HighSpeed Sync (HSS) feature, do I need to change any settings within the Canon Markii menu and or any where else in combination with the MiniTT1 + FlexTT5 to shoot above shutter speeds of 200?

Regards, Rain...