It may seem hard, especially in the new jungle, but you can do some serious clears and ganks if you can learn it well. Obviously, you may get some counter junglers, but let's put that topic to the side. You're going to get really blue dependent, and it could hurt your mid. Just follow these easy tips, and no... I'm actually not trolling. Really. Just thought I'd try sharing my jungle cass...

Okay to build her, it's like.. get hunter's machette, and 5 pots, standard start off. Then turn that grey little dingy knife into a pretty stone. ooh, rocks... and get the equally pretty tear of the goddess afterwards. Then get your boots, so that your snake feet don't get cold. Quickly turn that stone into the "Spirit of the give me ap and spellvamp", cause you need it bad if you want keep up sustain. Next up, turn your boots in to even nicer ones, magic penetration boots to be exact. Continue with your rush of magic pen by getting a colorful mask. You'll need this in order to hide your identity from enemy champions. Of course they'll soon see through your disguise, and you'llhave to upgrade it to the godly Torment right away. By now, laning phase may have ended, or people are started to actually... target you. Better get some health! grab yourself a glorious giants belt, then work on farming and killing to turn that tear of the goddess into a fancy little Archangel. However, if laning phase is still going on at this point, you should instead put that blasting want into making a crystal scepter. In the near future though, those will help you secure any runners with your toxic ways and feminine whiles. After that, you're pretty much set...Grab yourself some ghosts with any excess gold and hunt down the people who thought you were trolling... show them no mercy.

Basically, start off your blue buff. You'll wanna start your w, and be maxing that at your convenience, since it's your best ganking tool before 6. The damage over time and poison for your e spam will help rush through camps. After getting your tasty blue buff, go do your usual route, wolves, wraithes, red buff, but watch your mana usage. You'll wanna upgrade your machette and then grab a tear of the goddess soon for mana consumption and later damage. Red buff isn't really needed since you'll have a passive slow with your w already, so give that **** to your adc, I'm sure they'll love you for it. Once you've finished your boots and gotten your spirit of the wraith, you should be able to solo dragon no problem and be able to come out of the pit with enough health for a clean gank. Level 11-12 would be around that time. For later large monsters, golems, buff holders and dragon, the strategy is pretty complex... throw down your w and mash that e like it's a karthus ult. Good jub, you clear faster than a skarner.

Those scrubs won't know what killed them... Basically, your strategy should be comming in from behind, and putting down your w on either their current running path to, or their escaping path. The slow gives you enough time to catch up and nuke with e, and put down a q for your extra movement speed. It's always polite to let the champion who's in that lane get the kill, but... Cass is like teemo, that DoT is killer. Once you hit six though, your ganks will turn into a flash in front of the enemy champ and a quick ult to freeze them in place. Good job. Now go kill some sssssssssscrubs.