I main jinx adc, well, that's one of my most played favorite role to go. But, I never knew what to start on jinx, her first fully built item, I always started infinity edge but lots also say to start bloodthirster, please confirm what's the best to get first?!?!?
vs. 
?!?!?!?
As with anything, it depends IMO. I'd always try to rush bf sword, but from there it really depends on the lane matchup. If you're having a rough time or you're pretty behind, the shield and lifesteal from the bloodthirster will help you out in lane a lot. If you're even, just slightly behind, or ahead, I'd go with infinity edge 100% of the time as it is the vastly superior item IMO.
Also, for future note, this should go under tips and tricks :)
IE is usually the better buy on most ADCs, but it's an even better buy for Jinx, with her attack speed steroid you're going to have more chances to crit and more crits means more damage.
But of course, if you're losing your lane, the sustain provided by Bloodthirster is probably going to be more helpful, but you can just split build IE and BT. Get the vamp scepter and then finish Infinity edge.
(Also, even though Bloodthirster is considered the better buy, I find Essence Reaver to be pretty good on Jinx as well. I prefer it over BT, even if it's not "optimal".)
Only take as much LS as you need. you can get a Vamp scepter if your struggling, but hold off getting the BT until you get your core DPS items.
For me, this is usually an IE, a Shiv, and a LW along with my boots before completing a BT.
This is how I see it with AD carries.
If your winning lane or going even, Get infinity edge.
If your losing lane super hard and just want to farm it out for a bit. Bloodthirster.
Ofc there are some AD carries who benefit from rushing other items first
EX:
Personally I rush the BT most times, but it really depends if you are getting bullied in lane. You might need the lifesteal. If you are dominating in lane just got for IE first. I always try to get a BF and boots on my first back or BF and Vamp Sep.
Ok, from one main to another, It's generally better to start , in fact i start it basically every time, but, there are some times when might be necessary. For example, you're losing lane, the enemy bot lane has lots of poke, and your support has no heals, shields, etc. Then it would prob be a good idea to get .
Also, once you've gotten your or , you should get 
, 
(It's much, much better than shiv now after the buffs, and probably was before them too) Here, you have to make a choice on your next item. If you started , then you basically have to get now. But if you started ,(Like you should probably start in 90% of your games) then you have to choose between 
and . If the enemy team has lots of armor, or tankyness, then I would go , if the enemey team has poke, or you constantly have to go stop a split pusher(that's not tanky) I would probably go . I usually choose , because the effective damage is amazing.
Right now your build should look like this: for your last item, it's pretty situational. Do they have a fed 
chucking spears at you? 
is your best friend. Do they have a 
, 
, or 
ulting you with no chance for escape? Then get a 
Do they have a 
or 
, who you just cant get away from? then 
is your best bet.
I hope this helps you out!
Thankyou all so much!
