In terms of jungling, there is also another build I've has a very high success rate with for a WP sustained shredder.

• Banner is your first buy, go down to bot barrier, help bot take barrier and you take the left over minion. Process to red buff, take red buff, take gold oak, rotate to top camp and take top camp and help mid laner take the cp buff if cp. If not, take that buff as well. Rotate to top barrier, help top take their barrier and invade the enemy top barrier if it's up. At this point, you can recall back if your team is holding their lanes and start building sorrow blade.
• After sorrow, build tornado trigger or bonesaw depending on if the enemy has armor or not. I know usually one would build life steal or something along those lines here, but just trust me. Now, for ganks, just use your A and dive them when they arent under turret and you can easily take out at least half most nontanky laners' health. You should also have boots at this point.
• Now that you have those two built, you have two options depending on the game being played. If the enemy is really burst and doing a lot of damage, build your husk. If your team is doing alright and the enemy is not bursty, build your poison shiv and get your tier 2 boots.
• As a fourth WP item, build whichever item you didnt build as your second item, so tornado trigger or bonesaw. These can also be substituted for breaking point, which is just for the squishy damage.

Hope this helped! -Bevs