If I starting Red side I'll normally path from Red buff, ward the enemy raptor bush, and steal their red. If they contest, you can easily spin over the baron wall if necessary and take scuttle before returning to clear your blue side or gank mid/top.

Pathing for blue side, I will solo red unless top chooses to help on their own, ward the enemy blue, take scuttle, gank mid, take the other scuttle, then gank bot, or clear blue side jungle.

Once you can get 1050 gold for tiamat you can clear raptors and krugs very quickly,and start ganking more. Tiamat and lvl 6 are the first big gank potential spike since you can dive safely, but at level 3 you can gank somewhat successfully with a point in W.

Ward enemy raptors or wolves whenever possible for your laners to track the enemy JG.

Mid game is all about objective control. Use your ult and ghost to secure dive kills when necessary and prioritize turrets to free up your lanes. I often finding myself prioritizing top turret so that that laner can help with herald, then roam to mid or bot and continue snowballing your lead. Dragons are great, but in the early game establishing map control is most important, and herald should take priority over all dragons besides infernal.

If your lanes are feeding, play safe and wait for the enemy to make a mistake. Trynd can easily shut down fed enemies who do not respect his ult, especially coupled with ghost.

Play around your team as much as you can. Your job in team fights is not to get all the kills you can, then die. You should make yourself the focus of all the enemies' abilities since you can soak them without dying and then get out. I generally go in what looks like just a little too deep after the engage has started, do as much damage as I can, pop ult, count to 3, then spend the last 2 seconds getting away so I don't give kill gold. This will enable you to go elsewhere on the map to create pressure while everyone is finishing/recovering from the fight. Once the enemies have blown their CDs on you, your team can easily clean up, or back off as needed.

If you split, as soon as a member of their team comes, if you can't kill them solo, go flank the rest of their group and collapse with your team as 5v4. You are too good at pushing for them to ignore. Just use your best judgement as to whether or not your team can handle an enemy siege without you. If they can't, just group.