HI There,
sounds more like a periostitis at the tibia (pre-stress fracture level) secondary to the poor lower limb biomechanics. Whilst i somewhat agree to treating the lower back i would also advocate for core strength and the podiatric orthoses for foot correction. The tib ant is likely tight in response to attempting to stabilise the foot and ankle as tib post just isn't doing the job well enough or isn't in a biomechanically advantageous position with the pronation to be effective. this person is likely a bulky soleus type runner with either flat foot or heel plant with jogging rather than a gastroc toe planter so soleus stretching is really important - you're on the right track there.
As far as manual treatment goes, it can be bruising but effective to treat the soft tissue of tib ant but more particularly tib post on the posterior medial margin of the tibia.. it's generally knotty and thickened and responds well to deep tissue work and manual massage stretching as well as increasing vascularisation and healing of the chronic periostial inflammation. it is quite painful to treat (along the lines of ITB massage) but can be extremely effective with results within a few sessions if you're on the money. Dry needling the periosteal margins of tib post is also effective in elliciting this response but i find the manual deep tissue work more beneficial.
also it may be worth your patient trying ice massage for themselves after running (polystyrene cup full in the freezer then just peel a layer of the cup off each time you use it and it stops fingers from freezing holding an ice cube!) to minimise acute inflammation and aggravation although taking 2 weeks off running and impact work would be better (they will need to NOT run with new orthoses for at least that long anyway).

Good luck
msk101