Scaling Sompping Ground Support Gem Damage

Stomping Ground
Support
Attack, AoE, Physical
Support Requirements: 5 Str
Supports Travel skills, causing your footsteps to crack the earth and emit damaging shockwaves while using the skill.
Shockwave
Support
Deals 80% to 120% of your Strength as Physical Damage
Shockwave radius is 1.8 metres

I would assume aside from stat stacking Strength, that any Area damage increase, Physical damage increase, and generic damage increase would increase the damage.

Can anyone confirm if Lay Siege for generic % damage and area damage passive nodes increase the damage cause by this support gem?

Or does it only give the 80-120% of your strength as physical?

Thanks!