'mostly depend on' is a correct and commonly used phrase in written English.
You can use this phrase to describe something that is largely influenced by or dependent upon something else. For example: "The success of the project will mostly depend on proper implementation of the plan."
All have witness protection programs, but they mostly depend on local authorities for enforcement.
The best platform for you will mostly depend on the type of posts you're going to write.
Whether or not the Tesler ruling has any practical effect across the legal system will mostly depend on what action the courts and Crown Prosecution Service take.
Aereo's fate will mostly depend on whether the courts deem its transmissions to constitute "private" or "public" viewing (the latter is barred by copyright law).
"But how much we can succeed in producing will mostly depend on the new government, the conditions they create and access to foreign capital," Mr. Eric said, waving a copy of his business plan.
Throughout Africa, outbreaks of meningitis are tracked over the Internet so that epidemics can be stopped early.Yuppie toys in rural BangladeshGranted, these health-care schemes mostly depend on charity for their funding.
Vacation watering systems mostly depend on the laws of physics to move water from reservoirs to dry pots: wicks or tubes with sensors that go right down into the soil, or capillary mats that bring the water in contact with the drainage holes on the bottom of the pot, where it can be absorbed and transferred to the soil.
Rural community famers mostly depend on agro-ecosystems for economic development through farming activities.
The characteristics of a DC/DC converter mostly depend on the feedback control loop.
The accuracy and validity of the results mostly depend on the quality of the data available.
The open graded friction course (OGFC) mix performance and its effectiveness mostly depend on its permeability characteristics.
