High-level mid Invoker guide

Well, thanks! this guide is kinda old and I forgot to update some stuff, Forge Spirit is indeed great vs Monkey King and Skywrath Mage, I'd say it's even better vs Skywrath Mage considering he's going to spam his Q which I forgot the name so I can't give it a fancy icon, and with lvl 3 Quas you can handle it pretty well, but when I made this guide mid Skywrath Mage wasn't that common of a thing.
The Tornado into Chaos Meteor into Cold Snap or with the later before is a pretty common thing, but most players know about it so you can't just walk into them and do it, but for it to be effective you do need to be close to them, Sniper and Lina have long attack ranges and are not good targets, but Shadow Fiend sure is, most Shadow Fiends will outfarm you because he just farms faster early on, using two Shadow Razes in the lane to farm it fast and then go back to the jungle where he stacks a camp or farms a stacked one or maybe even two, I'll add it into the guide.

About Scythe of Vyse, it's great versus Black King Bar indeed, but there's a factor that in my opinion makes Shiva's Guard better, getting picked off, it happens some times, a Smoke of Deceit gank from a not warded area into a lucky jungle find late-game can cost you a game, Shiva's Guard might make you get out with maybe that 100 HP which you can easily Tornado and Ghost Walk, and another really important thing, with Shiva's Guard and the lvl 25 Tornado talent, you can farm waves very fast, giving you that extra gold, but in a game that isn't going late-game today I'd get a Scythe of Vyse versus a good Black King Bar carry, but if it's a game that might go late-game but there's a lot of teamfights going on, I'd pick Shiva's Guard over it.
also, using Scythe of Vyse in a support and right clicking him with Alacrity and maybe Cold Snap or throwing a high precision Tornado into a Sun Strike is good enought, no need to spend Deafening Blast which can save you from death and disable multiple enemy team heroes, and Chaos Meteor, probably your second higher dmg skill, the first being a good Cataclysm, which I do get more than the Alacrity buff these days after lot's of testing

There's a thing you're not considering, Lone Druid was pretty strong at the time I made the guide, the build you play like sniper but with the druid, it was the meta, that's why it was so strong, today it still kinda is but you can kill the druid and ignore the bear some times with a good Tornado into Sun Strike into Deafening Blast which is the best early-mid game combo possible, even tho it's really hard to pull off because of the SS timing, but with lvl 3 quas + Aghanim's Scepter it oneshots the bear, and early on you can just Ice Wall the bear these days, Viper was also stronger and different

Also don't assume everyone who is reading this guide sucks with Invoker. Some people like me just enjoy reading random guides and it's very rude so calm yourself.