This is the ultimate strategy for winning every game at 20 min playing as Rek'sai.

It's really simple to make it works. You only have to learn how to do this https://youtu.be/6BU1DInle2c and also learn the jgl foundamentals:

1. Win conditions (soul, winning lanes and loosing lanes)

2. Counter-jungle movements (Tracking, invade, jgl matchups, counter-ganking)

1. Buy only the jgl item without potions (very important!);

2. Go to the river top and drop a ward in the bush then recall and go to the buff situaded in the bottom lane (for a better leash);

3. Do the full clear (I usually end it at 3:20 but faster is better);

4. Recall immediately (you can go for a gank if you see a free kill... if you go for that and don't take a single kill/assist you already inted);

5. Buy the serrated dirk thx to future's market;

6. Enjoy the God mode

From now on your only focus should be:

a. Spam ganks

b. Erase the enemy jgl from the game

c. Rush every drakes/heralds if there's not a solid carry in your team.

DO NOT farm your jgl when you are backing from the base: the serrated dirk is the most valuable reksai's power spike in the game so use it properly. You are allow to farm the enemy jgl or if you are gonna lv up doing one camp.

Also remember: you're the best dmg dealer at this point of the game, however you are not invicible... don't take 1vs2 fights or do not try risky plays if you don't have the flash up (like dives pre-6). Even invades without prio are possible since you will delete the enemy jgl in a combo.

Why Collector first item?

Is the only crit item that can be build with the serrated dirk and it also allow you to continue to take an huge lead securing kills in order to carry the mid game too. The crit allows you to delete people (the Q's bonus dmg increase the crit dmg) and also allows you to clear camps faster.

Why build Galeforce over Prowler's claw?

simple: prowler's claw is a joke. 20% crit are much better than 21 lethality during the early game, Attack speed is better than cdr and the actives are not even comparable... The galeforce is a free dash and do more dmg than your ult at lv1 on low hp targets (full combo+R into galeforce is a kill secure). the Prowler's claw, on the other hand, is much harder to use on high-mobility targets and do no dmg compared to galeforce at the same cd. You can even use the galeforce defensively. Also: if you build it after the collector you will have 40% crit chance (huuge) and free movement speed (broken).

If the enemies didn't ff yet, just build defensive items like sterak or black cleaver if you are against tanks (maybe both).

I did this guide as fast as I can... sorry if i'm not explain the champion's kit or matchups (there are a lot of valuable guides on mobafire and someday I'll do my personal complete guide) and also sorry if my english is not the best (i'm still learning it :P)