Get Stalkers Blade so you can slow them down for a free kill.

The faster you get devourer the more fun you will have when you get sated.

If they have heavy AP (Lux, Veigar, Katarina, Etc) Then build Maw so they wont be able to delete you.

If you die really fast i suggest you build Bloodthrister or Steraks for more sustain.

If your more into kiting (Like Me) then build Frozen Mallet and Runaans.

Ounce you get Rapid Fire cannon you will be a kiting god.

Start Krugs first so you can take red without that much health taken away from you.

Ganking with trist will be easy. All you need to do is jump towards the enemy.

After you take red, i would suggest ganking top if you started in the blue side of the map. If you started in the red side then gank bot.

At level 6 gank bot and if you got a kill from that take the dragon.

If your really behind for example 1/4 just farm till sated dont bother fighting or going in cause you will just die. I would suggest farming scuttle crab alot because it gives 2 stacks instead of 1.

If the enemy jungler comes to your jungle, go in and kite him until he leaves.

Act like the ADC in fights. Just stay around the support and kite.

If your really fed and can kill anyone in there team. Jump behind them and take out someone and jump back to safety.

Spilt Pushing in this build is insane cause you will take out towers faster then anyone can. Especially if you have Baron or 2nd Dragon passive. And if they ever try to stop you ult them back and jump out.

Pros!
Great Split Pusher
Easy To Kite With
Fun
If Fed You Will Be Able To 1v1 Anyone
Awesome Ganks

Cons!
Early Game Is Very Hard
Long Cooldown on Jump
Very Squishy
Easy To Get Caught On CC

Trist Jungle is not a good idea to play in rank, but really fun playing with friends or norms. If you really want to play Trist Jungle in rank, play alot of games in norms first so you can get better at it. Just remember the things i taught you and everything will be easy for you.

I wish you luck!!