Pathing:

1.
Standard buff start (most of the times at blue) then you can do all 6 camps in about 3 minutes and 20 secs if ur experienced enough with graves. You will get early level 4 off of this. Try to invade a lot and gain a level lead / gank ez bot and top alot cuz those are the easiest for graves to get a lead off of!

2.
Start q to raptors krugs red blue, then invade / take crab or both.
After that finish your camps in a row from gromp to krugs again.
this way ur level 6 or almost level 6 so you can presure the map more.
Recall and repeat. Now u can start at krugs again so you can place ur control ward at drake or take drake instead.
(Constantly invade n look for invade kills once u have jungle item and ult up. Look for ganks in between and you should get a pretty huge level lead on the enemy! Herald might not seem important to some lower elo players but it can really help you finish quick n get some early platings with gold. If ur there when it spawns instantly take it n gank a side lane. This way you optimise ur gold income n ganks you also can take a second herald later into the game to close it out which many players struggle with.)

Powerspikes:
1. Level 6 + full jungle item
2. Third item completed
3. Early game max e stacks by good pathing (only works on buff start)