Hrm... I've yet to reach lvl 70 but my plans are like this...

Extended Crosshotbar L > R = Set 1 Left side
Extended Crosshotbar R > L = Set 1 Right side

Set 3 for single target mode
Set 4 for AoE mode

Set 1 Left side:
X -> Jolt
O -> Verfire
T -> Verstone
S -> Impact
Right -> Acceleration

Set 1 Right side:
X -> Riposte
O -> Zwerchhau
T -> Redoublement
S -> Embolden

Set 3 Left side:
X -> Verflare
O -> Verthunder
T -> Veraero
S -> Verholy
Down -> Lucid Dreaming
Right -> Swiftcast
Up -> Manafication

Set 3 Right side:
X -> Corps-a-corps
O -> Contresixte
T -> Displacement
S -> Fleche
Up -> Addle

Set 4 Left side:
X -> Scatter
O -> Verthunder
T -> Veraero
S -> Moulinet
Down -> Lucid Dreaming
Right -> Tether
Up -> Manafication

Set 4 Right side:
X -> Corps-a-corps
O -> Contresixte
T -> Displacement
S -> Fleche
Up -> Addle

Set 2 Right side:
O -> Limit Break

Btw I mainly keep myself on Set 3, circling between 4 and 2, and use 1 as extended as a sort of "universal set".

As I've yet to get to 70 I may move some skills here and there. Not yet sure where to put the heals for example. May set them on Set 2 as a Support Set.