While this build can possibly work, as soon as you die, you lose almost two-fifths of your attack damage. Granted, it does guarantee 100% lifesteal when fully farmed and can do massive amounts of damage, but you need to make sure your damage can't be destroyed that easily.

Weak Guide. While this build "can" work, you leave out... well everything else. For one thing, you should consider mana regen runes, they sure solved my mana problems on this chick, especially early game before I can fork out for an item. I can't imagine going back to not having any. Your solution is to just not use abilities as often... which will actually mean less dps than having the runes so you could use them more often. Get it? I put mine on blue so that I don't have to lose much DPS, since any other color is better, at least for AD dps. Mana regen/level blue runes is great on this hero and you will see a huge difference in the number of times you can throw out traps and shots.

I also don't recommend 0 defense. You should look at the Aegis of the Legion or Hexdrinker. They are really cheap and offer lots of defense. With no defense at all, you will drop instantly. This just isn't a hero that can all gun no tank and win very often. She's too frail. I especially like the Hexdrinker because 1vs1 with a caster I get a shield before dying, ensuring that he dies before I do. If you're having issues vs a full melee team consider a Thornmail, 100armor+thorns and it's only 2kg. But I prefer the Bloodrazor myself, as it has some DPS on it too.

Finally, I should point out that Caitlyn is NOT ideal for going center lane in Rift. If you do, you're really handicapping yourself. If you went bottom, you can shoot at all the minions from the bushes and make the passive build 2x as fast, doing far more dps. This is really important in the first 15mins or so of the game before the passive ramps up with levels. People have often told me to go mid then rage when I refuse, clearly not understanding how much better Caitlyn is early game with bushes to use. The bushes add DPS and the traps keeps enemies out of the bushes.