Mesh.SubmitVBO in Profiler GPU Uses... How to improve it.

Mesh.SubmitVBO is taking 48% to 68 % with 12 to 18 Draw-calls in GPU Uses. I want to improve it. so I can use shader which can make my 3D scene more and good catchy, shiny and good looking.

I am using Diffuse Shader on 6 Geometry, Bumped Diffuse on 3 Geometry, 6 Lance Flare, 3 Point Light and 7 Spot light which are came in camera boundary at different time as per camera angle and positions.