Tip : Downloadable UV layout tool : worth the purchase https://www.uvlayout.com/

MAYA : Notes (Blender notes below)

• UV Set 1 : used as texture map
• UV Set 2 : lightmap
• Scale UVs on UV window for tiling do not scale by UV coordinate node
  • Blender does not accept information coming in from Maya on tiling based on scaled UV coordinates, it shows correct if viewport but is broken in engine. Please scale in UV window.
• Keep UVs as straight and orderly as possible
• No over lapping UVs

UV Set 1 : Non Tile

UV Set 1 : Tile : scale up in UV editor

UV Set 2 : Pre Plan for Lightmaps

• UV Set Editor
• Setup two unique UV sets