Vastu shastra explains to us that subtle is very powerful.
Vastu is not just about the direction of sunlight and air flow.
The knowledge of vastu shastra available at this age is limited.
Another important aspect is that all negative effects can be reduced by increasing the "satva" within and around.
This is achieved by practice of meditation, contributing selflessly and being in the company of the pious.
So while you must strive to minimize the vastu doshas , it would help to be aware that a strong and satvik mind can very easily overcome the ill effects of vastu.
Please specify what level of remedy are you fine with.
Remedies range from rearrangement of the elements in floor plan to things as subtle as Mantra.
Mantra are very powerful and how they work is a secret.