There are "Cannon fodder" Assassins, the ones who haven't yet accepted that the Assassin isn't made for fighting live opponents, attempt to do so, then end up putting kill-money in someone's pocket. Then there's the good Assassins, the ones who target bots rather than humans, who realize that you should only attack humans if you catch them unaware, and who can kill a turret with a smoke bomb and a sword.
I'm the latter.
A few tips for Assassins who may be reading:
-If you jump after setting off a smoke bomb, you can totally jump hella high. But the smoke bomb has another use: It can temporarily disable bots and turrets, so you can run up and attack the, and probably survive. (Might not work on higher-level turrets)
-Addendum: Your shuriken launcher can fire shurikens faster than a Support's Heal/Hurt can repair his fire base. Thus, being just outside a fire base's kill range and firing like mad is a good way to get those pesky fire bases off the field. It works with all turrets, too.
-Addendum 2: Pick and choose which turrets to kill. I recommend prioritizing Long Shot turrets, they're the most dangerous since they can hit nearly the other side of the map, but they also have the least health.
-Upgrade the Assassins passive perk to maximum first; a sword and no fall damage makes all the difference.
-You have the lowest health pool of all the Pros. Attempting to be Gray Fox (Though technically Mr. X from MGS2 is a more appropriate comparison) and cutting up an army with just a katana and a cloaking device is freaking suicide. Avoid human players in groups of two or more.
-Addendum: Get a custom class, make it an Assassin, and give it Gold-level Armor. This isn't advice, this is a rule. That Gold Armor endorsement is the barrier between life and death. You'll be able to survive most front-side grapples with it. Force Silver and Bronze level, I'd recommend rate-of-fire and skill recharge.
-Bots are your bread and butter. The only classes better at killing bots are Tanks and Gunners, and they're more preoccupied with enemy Pros. You're also one of only two classes that can grapple Jack Bots.
-Addendum: Hitting the reload button with your kunai/katana makes you dash forward and perform a very powerful strike. Great way to break the ice, and by ice, I mean enemy bots.
-Buy some turrets. This is actually really good advice for all Pros, actually. Buying a turret is both a great way to defend your base, and to make some quick cash. it's not a purchase, it's an investment.
-This one is also advice for all Pros, but taunting after a kill gets you another $50.
-If you have juice, remember you have a really short life expectancy. Don't be stingy. Better to use it to absolutely shatter an enemy's defense than to die and wish you had.
-You may, at one point, wonder how enemies always seem to know where you are.It turns out, at close range, you are very visible. And noisy. And when you sprint while cloaked, you kick up a big cloud of dust.
-Always keep some money saved for the Annihilator. Because you're the fastest class, you can get there first. Likewise, always be sure to keep an eye on the Ejectors, and set them off if there's a big crowd of bots, or enemies, or it looks like you could get a ring-out with it.
-When the enemy moneyball is down, a timer starts, and when it runs out, the shields go back up. All it takes is ONE shuriken to restart that timer. Wink wink, nudge nudge.
-One more piece of advice, for all classes: Only bots can take the moneyball's shields down. Not everyone realizes this, and they waste time and effort trying to bring the shields down themselves.
Here's a wiki page for more tips and info.
