The Ins -n- Outs of Split Pushing (Rat Dota)

Heros that I believe do this well:  Tinker, Terrorblade, Nature's Prophet, Lycanthrope, Anti-Mage, Morphling, Spectre, Broodmother

This is what I am thinking when I split-push.
  1. Is it night time / day time (vision for enemies)
  2. Are enemy heros on map / do I have ward cover
  3. Should I farm the jungle once I feel I've reached too far
  4. Do they have any heros that can burst me down + silence
  5. What is my team doing in the meantime
  6. What towers do we have, incase I need to Town Portal Scroll Town Portal back.
Would like some more input