User blog comment:Kharjou/ADC tips chosing first big item/@comment-8013046-20130409222746

well.... heres the problem. you're doing this on cait based purely on 2 items and purely on x auto attacks+abilities. and thats on cait. cait's q with its longer cast time is actually NOT supposed to be used in teamfights. unless you want to finish of a long range weak enemy then go for it. and you also calculated her ult. you're not using your ult in teamfights. and especially on cait an ult is obvious. so this is where the fault in your logic comes from. you are basing this on burst. when a 2 second charge ult and a half second charge q are basically taking the time for 3 auto attacks and enough time for an enemy to get out of auto attack range. so the problem with your logic is the team comp your on. if it's a poke comp where you'll be getting a lot of q's off and your ult will be used for poke. go for it. blood thirster will work wonders. but if its a comp that cait is just a super safe ADC that's supposed to lay down auto attack after auto attack? infinity edge is better by as you said, 150 damage. and if you're going to be building your 2nd item as a statik shiv or a phantom dancer. then the extra crit chance will make the IE even stronger too. the game isnt about 1 phase in the game its about all of them.

also.. you didnt include BotRK rush. which is actually one of the better rushes ATM. since it gives decent AD good chunking and almost as much AS as a PD. but you cant calculate that into your math since the % hp. you really cant just do math and put down a whole burst combo and say "this is the best thing to rush because the burst combo does more damage" i mean. on an AP maybe since they are 100% burst damage so really that doesnt matter sure rush as much damage as possible on them. but an ADC who will be mostly auto attacking? especially like caitlyn? who's burst takes a LONG time to pull off? she's not using that burst combo in a teamfight. in lane? yeah that'll happen. but in a teamfight? i dont think cait will sit still for 2 seconds and just let the enemy team melt her down in a second so she can get the burst damage off. and i dont think she'll take the second to use her q. all good caitlyns just auto attack and set up traps in teamfights. q and ult are for cleaning up or pre TF poke.