Pro draw call is an editor extension that will easily reduce your draw calls by creating atlases for your models so they can share materials for static/dynamic batching.

Custom shaders?, no worries, the tool automatically recognizes any shader that uses textures.

Supports Unity 5, 2017, 2018, 2019+!
NOTES:
- Easy, 2 clicks and have your scene optimized
- No scripting required.
- Meshes automatically set up and adjusted.
- Full lightmapping support.
- Your source assets will not be touched.
- Full multiple material per game object support.
- Full support for tiled materials.
- Examples included for you to see and play.
- Quick and easy object search by tag or layer.
- Option to create prefabs for the generated objects.

Still not sure? Just download the light version that can be found here, give it a try and see if it suits your needs.

ProDrawCall will not work with UVs outside of [0,0-1,1]
For multiple material GameObjects all the materials have to have the same type of shader.
For more detailed info you can check these links:
-Video how the tool works
-Video on how to easily set up your assets
-Video on how to quickly solve problems
-Video on how to work with LOD groups

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