This is my guide to one of the many ways in which you can play The invoker. this is not an indeapth look into the invoker as a character, though that may be what i do next as he is one of the more complicated heros, which in my mind makes him one of the most fun. 

This build has two distinct phases, the first is to get both Exort and Quas up to level 4. then we change strats to all Exort and then Wex which looks like this

Build

E
Q
Invoke

E
E
Q
E
Q
Q
W
Invoke
E
E
E
W
W
W
W
W
W
Invoke
Invoke
Q
Q
Q 

Now the spells we are focusing on for this build are going to be EEQ - Forged Spirit and WWE - Aclarity, the first is amazingly powerful in the begging people dont expect an invoker to be able to put down that much damedge that early, Always have three Exorts up unless you are healingthen throw up the Triple Quas. with this it is unlikely youll pull a first blood alone due to your lack of slow, but with something that does slow the damedge output is insane, and once you get to level 9 you gain two, which massivly increase the output as their armor is also reduced heavily.

The second spell mentioned here is Aclarity, now some like coldsnap with this honestly casting coldsnap on someone and then attacking will give you the same number of stuns due to the .4 sec cooldown especcially when used with allies, plus the aditional casting time to be honest is a wast as with this build you will be putting out 1k crits with no problem. Initially aclarity makes you somewhat faster, but also increase your damedge by a substantial amount E*10+10 for 8 seconds, by the time you get this with my build its addinging no less than 50 damedge. 

Now for the items

first thing we need is more health, always more health grab gauntlets circlets, and bracers to begin with, if you die more buy more, if not work on boots, as invoker with a 280 ms is slow. since we a doing physical dam i like me some tread, though not the best boot for moving fast the give AS and health, which is awsome for this build. then we start work on the suplement items, which can vary game to game. need mmore speed yasha might do you good, then manta if you want, or maybe a Euls, either of which would surfice. have a riki that  must die Necronomicon is awsome. but two core items should always be intact and that is MKB and HoD ( MoM is cool but from testing it does not apear to stack with aclarity if i am mistaken please correct me) Hod will be converted if game last that long. 

So as a reveiw get

-four levels of E and Q

-one level of W

-then level E and Invoke some

- Get core items Treads, Monkey King Bar, and HoD (to become Satanic)

-Get suplement items based on situation

-Own people hard with your Forged spirits in the begining and later with aclarity and forged (for the armor reduction) 

comments are nice, but OMFG this isnt how invoker is played is not a comment nor is you suck ect.  as for poor arangment and spell ect ill try to fix anything that looks bad.