People need to learn how to use the keystone masteries correctly

I just have seen a guide posted here and the OP said that people were going 18/12/0 on him taking the Fervor of Battle keystone, when they should actually go 12/18/0 and take the Thunderlord's Decree keystone.

Then I started to think something that I realized those days. People are constantly using the wrong keystones, for champions. Look at this:

http://i.imgur.com/UqoIdd5.png

5 players on this battle are using Thunderlord's Decree. Of all them, only Kassadin and Riven should actually be using it. On Thresh, you are better off going 0/12/18 and taking Bond of Stone. On Shyvana, I don't even know why one would take any points from the Cunning tree on her. As for Brand, she is better off using Deathfire Touch.

I am constantly seeing this nowadays, it seems like people don't actually know on which champions each keystone should be used. Well, let me explain:

1) Warlord's Bloodlust: Take this if you are going to stack crit. ADCs benefit very well from this, and also champions like Tryndamere and Yasuo. Any champion that benefits from crits should take this.

2) Fervor of Battle: This mastery is more oriented for auto-attack focused duelists like Irelia, Jax, AD Fizz, Xin Zhao, etc. Because they are constantly auto-attacking, they can take the best advantage of this mastery, and they also like to have many on hit effects.

3) Deathfire Touch: Take this on DoT AP champions like Swain, Malzahar, Anivia, Brand, Karthus, and Rumble. Why DoT mages? Because they can constantly apply this keystone's damage, making it more useful. I also like to take it on Vlad despite him not exactly having a DoT because his low cooldowns allow me to constantly proc, his Q is neither single targeted nor a DoT (thus procing the higher damaging part of this keystone) and I like to go on the Resolve tree on Vlad.

4) Stormraider's Surge: This mastery is better used on assassins because they have the burst needed to 100-0 an enemy in a few seconds and they can use this to complement their mobility, allowing them to survive better. Examples include AP Fizz, and Talon. Generally their burst is already very high so they don't exactly need Thunderlord's Decree.

5) Thunderlord's Decree: Use this on assassins like Kha'Zix, or burst mages like Annie and Xerath. It will complement their burst and ensure that they can kill an enemy as fast as possible.

6) Windspeaker's Blessing: This keystone should obviously be used on supports, but not on any of them. For example, Blitzcrank would not take any advantage of this because he doesn't have any in-build healings and shields for his allies. The champions that should be using Windspeaker's Blessing are the squishier, more healing/shielding oriented supports like Soraka, Bard, Lulu, Sona, and Nami. Be wary that some of those supports can get Thunderlord's Decree instead to allow them to better poke their opponents during the lane phase.

7) Grasp of the Undying: This mastery should be taken on very tanky champions, preferably ones that auto-attack a lot, like Dr. Mundo, Nasus, Darius, Trundle, Shen, Volibear, Malphite, Tahm Kench, etc. They tend to stack a lot of health, and some of them have auto-attack resets that make this keystone very useful. In addition, many of them have natural sustain, and this keystone makes them even harder to outsustain. Even the ones that don't have sustain will find this very useful to sustain back the damage they take.

8) Strength of the Ages: From what I've heard, this mastery is actually a very poor choice on any champion and no one should be taking it. I don't really know if that this true, especially since it could be useful on tank junglers, as they want to stack as much health as possible, due to Cinderhulk.

9) Bond of Stone: Champions that take the best advantage of this are support tanks like Thresh, Leona, and Braum. Especially considering that they will be in a duo lane, and they want to be as tanky as possible, since as supports, they can't afford to get as much tankyness as an actual tank. A full tank jungler like Sejuani may also find this to be useful.