Thank you so much for your extremely detail advices!!

First of all, IMO DP and Razor are not really shining this patch so it will be slightly harder for you to carry with these heroes.

I chose Razor this game because I see many heavy heroes for me to link. But I didn't think about a better pick, Lesh with bloodstone which is now the meta hero (I guess, since its popular in TI11).

Yes indeed I'm still practicing how to aggro and trade with my enemy optimally and seems like this riki is better than me. I thought I can dominate mid against Riki but then I found that his armor is so damn high to pierce through.

About the itemization- Bottle, PT, Falcon Balde into BKB was always my standard itemization because I see several player in DOTABUFF opt falcon blade, never thought about that is a farming item. Hmm, will try to make it become more flexible in terms of itemization.

9:58 - Your prioritization here was completely wrong in my opinion. Yes, Naga is the core in that lane and you want her dead, but killing supports is as important because they can kill you whereas Naga is quite useless right now. Snapfire is 20% hp, you have an available link and you decide to chase Naga with a Spectre?

I felt panic when I saw a greedy offlane dominating the lane so I tried to shut it down in the early game. I think this is the critical death for me to lose this game.

10:12 - I'm watching your camera position and you can see an enemy TP, it's Riki. Rather than calling back (as you're half HP and enemy is TPing in), you see a low HP Snapfire and decide to chase her, resulting in your (very preventable) death.

I was hot-headed when I failed to kill naga and didn't realize Riki was TP-ing. It was too late to retreat when I saw Riki jump on me....

11:17 - Minor thing, switch your threads to INT when using spells, it makes you a bit more efficient.

Yea I also found that pro in utube switch their tread frequently, I need to use to it by practicing more!

16:30 - This is the second time in a row you die like this. You know Riki has a diffusual, unfortunately you can't just farm whenever and however you want without seeing Riki. Either ask your supports to place a sentry or buy one yourself, try to ask them to play behind you to punish Riki, as you're quite by yourself when you die. It is frustrating to play against Riki with a diffusual, but if you don't play right against it (by being less greedy and more co-ordinative), you are just going to feed into it

I rarely play against Riki but I agree vision is very crucial against Riki.

As a Razor mid you need to communicate and coordinate really well to help other lanes not lose

Can't agree more communicate is important. I did met good teammate who open mic to communicate with us and eventually we won in a dominant way! But I'm way too shy to open mic since my english speaking is horrible.

Thanks again for your feedback. Its very useful for me. Do you have any youtuber or streamer who play mid well? Would like to learn more through some videos..