Shinsako’s kick doubles are a bit faster than her punch ones, so you should stick to those most of the time. As for linkers, here’s what you need to remember:
ORZ is the fastest light linker, but prohibitively slow on the medium/heavy ones.
Spirit slice is the fastest linker on the medium/heavy versions.
Air ORZ is…just don’t. You’ll need it for some non-lockout situations due to spirit slice leaving her a bit far away off certain moves, but it scales per-hit and is slow on the light version, making it a bad choice for damage.
For her shadow linkers:
ORZ is the highest damage, but is quite slow.
Spirit slice is the fastest, but switches sides.
Air ORZ does the same damage as spirit slice while keeping the same side, but is slow to start up.
For counterbreaker combos:
(COMBOS STARTED FROM LK AIR ORZ COUNTERBREAKER)
Shinsako does a bit more damage spending meter on her counterbreakers if she switches sides, but the meterless version is always the same:
0 meter: HK double, LP ORZ linker, HK double, LP ORZ linker, HK double, DP ender (47%)
Keeping the same side:
1 meter: HK double, LP ORZ linker, HK double, shadow ORZ, DP ender (52%)
2 meter: HK double, LP ORZ linker, HK double, shadow ORZ, shadow DP ender (57%)
1 meter: HK double, HP spirit slice linker, HK double, shadow spirit slice, DP ender (53%)
2 meter: HK double, HP spirit slice linker, HK double, shadow spirit slice, shadow DP ender (58%)