Agni Heavy Damage - 8 Season

In my previous guide, some people were outraged by my opinion about this item.
So i am explain, why this is a bad choice!

In 8 season it lose 10% of penetration, And now, what we get: + 95 of power,
which is not impressive, and 300 useless mana points (describe later). And, of course, passive ability, which give us +27 dmg from ult, for example, without penetration, vs average 2000hp person (experimental Ra in Jng training). If we pick 20% of penetration with same power we could get about +80 from ult, and add dmg for all of our attacks.
So, for the same money we can afford to take more power, and other usefull attributes instead of mp, like penetration or CDR. That's why my previous guide was contained Charon's coin, which was more effective even with less power.

I will not describe the abilities and their application, since you can already read this in the game. Let's analyse what attributes priority we have:

• MP5.
  We need it at start, and mid game, it's our ability to deal regular damage and live.
  
• Magical Power.
  It's core of damage deal for mages, obviously.
  
• CDR.
  We have a large procast with a long total time to realise it. That's mean our advantage is regular damage, and only way to get it, reduce cooldowns of our spells, then we can to deal damage all of the time of teamfight.
  
• Penetration.
  Obviously important, but difficult mechanics requiring careful calculation. Often we can allocate only to slots, for not lose CDR, so we need have as flat, as a percent of penetration too. Flat is more useful in early and mid game, but in late game we must have some percent, to increase total penetration.
  
• Movement Speed.
  Agni is tiny boi, this dude is really artillery, and for realise his best tactics and mobility we need to be a bit faster than our enemies.

Why i said MP is not what we need?
Actually our main damage and spell we use more often is our free mp ulti (wow,
who could think of). And we always would have enough MP with one doom orb as in mid game, as in late game toо. By the way we compensate MP for MP5. Fast regen is greatly matching Agni's gameplay.

Agni's two gameplay tactics it's hit&run and artillery type. What is mean?

Hit&run agni is at least situational fighting model, or main for blood god, which mean that we have great mobility, rushed an enemy, give them our procast, and fast coming away.
How to do it?
U know that our Noxious Fumes
should be applied within a second after others abilities - it's still getting stun. our procast is a long time to done. So, if we rushing in 1 enemy, for example, with Blink Rune, our procast would look like:

We need to stun as late as possible in order to hit the enemy with all charges. That's why, after 1st ulti we cast our 2nd ability, cause they casting faster. Path of fire at the end for burn, catch up, or leave.

What about artillery time: we just stay we just stand at max range or behind a barrier, and regularly casting. More often, especially in this state we use fumes for escape or cathing up, so we need to remind saving starter and soul gem buffs for an ulti.

If we have Soul Gem we try to always have 3, or 4 stacks depending on planning procast model.

It's also important.

What if we need it?
In Burst build state i recommend use an relics, or entrust the team.

in case of Blood God duild u can freely change Spear of the Magus by Divine Ruin.