So you bought Idris and you don't know what to do with him? Losing games even you try harding? Oh you came to the right guide becouse this guide will help you out.

Stay away form things that can stun you, from my experience - stun = dead. Don't be greedy - as I said stun and you are dead.
If you playing line go only for minions, ignore enemy hero.
If you playing jungle - you can try be greedy and get enemy minions or even a kill. Use scout traps they will help you know when enemy hero or minion spawned.
Map control - one step to victory.
At first ~3 minutes try not to be alone.

Most of your kills will be from chakram. Master it. You can land 4 chakram strikes. Play Video (Video isn't mine)
It's deadly when you building Crystal power.
Chakram simple combo: throw chakram and when it is coming back do "Shroudstep" into your target way, chakram will land another hit to him.
Chakram hard combo: throw chakram, when it is coming back do "Shroudstep", than wait till chakram going back to you again and instantly do "Shimmer Strike" on enemy, it will make chakram hit your enemy again, easy kill.

Building Idris Wp you have to be close to your target, my suggestion to play in jungle with wp.
Shatterglass - unlocks range attacks and gives you extra damage for basic attacks and chakram.
Aegis - you can block enemy's abilities
Sorrowblade - +150 weapon damage.
Poisoned Shiv - makes you perfect killer when you combine it with "Tyrant's Monocle" - extra damage and critical strike.
Halcyon Charges - perfect movement speed to chase enemy's.

Building Cp Idris you have to stay away from team fights and throw your chakram, my suggestion to play in line.
Shatterglass - unlocks range and its important building Cp.
Sorrowblade - unlocks blinking and if somebody will challenge you 1v1 (if you can't run away) than it will help you a lot with that +150 weapon damage.
Broken myth - with every hit you melt enemy defense.
Frost burn - easy to kill enemy if he tries to run away.
Aegis - same as wp, blocks enemy abilities.
Journey boots - helps you run away if you need to.

Hybrid is a little bit complicated becouse you can play how you want, it's good counter for enemy's that don't have a lot of armor becouse you'll put a lot of damage to them in small amount time.
I'm not gonna talk about all items.
Alternating Current - attack speed and damage, but this item is important becouse it will add extra crystal damage to your basic attacks.

Even all of those build will deal a lot of damage your number 1 enemy is stun: Catherine, Glave and others who can stun.
Another dangerous enemy is Koshka, her high mobility can be dangerous for you becouse he can do her abilities really quick and leave.
Armor penetration - enemy's with armor penetration items can quickly do a lot of damage for you, in this situation I would buy "war treads" for extra hit points.

Stay away from team fight to not get stunned or silenced, than quickly join in throw chakram and get easy kills, suggest you go for carries or sometimes junglers.

You are Nimble assassin, chill in bushes till somebody gonna fall back from enemy's, quickly ambush him and boom easy kill for you.

So you became master of Idris? Getting East Aces? Congratulations!
If you have any suggestions just comment here.