I'm having a lttle trouble understanding which keystone masteries are best. I get that warlords bloodlust is good for crit users but things like thunderlords decree and deathfire touch I don't get when I could get them? Any advice on when I should get a specific keystone mastery? (talking about fromall trees). Thanks :D
Deathfire Touch - use it one sustained damage spellcasters and pokers. Like Azir, Anivia, Karthus, Malzahar, Rumble...
Thunderlord's - for burst spellcasters. Lux, Ahri, LeBlanc
Stormraider's - also for burst, if you need help to get away after the deed is done. Talon, Kha'Zix, Zed
Fervor of Battle - champions who auto-attack and cast a lot. Jax, Riven, Irelia, Yi
Bond of Stone - tanky supports and tanks who want to support their teams. Leona, Taric, Blitzcrank, Alistair
Windspeaker's - for shield/heal supports. Nami, Karma, Soraka, Sona, Janna, Alistair
Grasp of the Undying - bruisers, tanks, juggernauts. Sion, Darius, Malphite,
Strength of the Ages - dunno.
For assassins that want more burst get thunderlord, assassins that want more sticking or survivability get stormraiders. Most other mages will want Deathfire.
Bruisers will want Fervor of Battle or Grasp of Undying. Depending on preferred playstyle. If you get crits obviously you want Warlords. Some Adc's like Kog'Maw and Kalista do better with Fervor than Warlords. Jungle obviously depends on playstyle but tank junglers will want Strength of ages. Tank Sups will want Bond of Stone, Sustain sups like soraka will want Windspeakers.
there are many other cases but those are the general roles and positions that you would associate with each keystone.
