Cz tons of people were using this mastery despite whatever champions they were using, even if it's on an ADC or Tank champion like 
. Plus, due to the power of this Keystone Mastery, it overshadows the other 8 Keystones a lot, so shouldn't it be logical that the Thunderlord's Decree mastery should only be proc on the 3rd spell hit only?
Aeolian Melodies1 votesNah because then you`re removing it from poke supports for no good reason. Even most mages would struggle to use it without AA being calculated.
Maximum Morde1 votes[{quoted}](name=Aeolian Melodies,realm=NA,application-id=3ErqAdtq,discussion-id=tEie5H7d,comment-id=0000,timestamp=2015-12-22T01:31:01.577+0000)
Nah because then you`re removing it from poke supports for no good reason. Even most mages would struggle to use it without AA being calculated.
Pretty much this. Unless they extended the duration of the buff to give you an absurd amount of time to proc it, you'd only see a few multi-hit mages ever procing the thing.
BeatzBoyFTW1 votesI'm pretty sure poking supports like 
should be more than fine by using her own abilities, unless you mean idiotic players going 
support.
Also, 
already gives you 10 additional damages & 8 gold on hit with your AA, so I dunno why would you want more with TD. 
was already been nerfed due to its usage at mid lane, and what if is also getting nerfed due to its synergy with TD? Let's try to not let that happen please.
TheDiff1 votesWhat the fuck are you talking about? They are talking about procing Thunderlords Decree for damage, not gold.
BeatzBoyFTW2 votesI also added the words "10 additional damages", please read a little better.
What I mean is, making them doing a single attack which procs all 3 conditions is too much of a reward imo.
Aeolian Melodies1 votesI'm pretty sure poking supports like
Also,
Annie only has 2 non-ultimate dmg spell, so you're telling me she would want a mastery that only procs when she ults? As much as I loathe her, this is ridiculous. In fact, most if not all poke supports do not have 3 non-ultimate damage ability. I can only think of 
(DoT on W), 
(because of W ticks) , 
, and 
(because of plants) who would be able to do so. All other poke supports would be unable to use the mastery without ulting. Lulu, Soraka and Janna wouldn't even be able to use it, ever.
Poke supports might want more poke from TD because, oh, idk, THEY'RE POKE SUPPORTS? You want to emphasizes and enhance what your kit already does, make it stronger. TD is at the bottom of the tree that non-tank support wants. You have the choice between Windspeaker blessing (useless on non-healer, non-shielding champions), Stormraider's Surge (useless since most supports can't deal 30+ percent of a champion's HP bar within 2 seconds, and even if they could, who gives a flying fuck about bonus MS when you've already used your rotation), and Thunderlord's. If you make Deathfiretouch the only relevant mastery on damage supports, then you're forcing them to drop precious support masteries along the way.
I'm not saying "don't nerf TD" (although I prefer the route RIot is taking by buffing the alternatives). I'm saying "don't nerf TD that way".
Posui Gart1 votesBetter idea is to count any spell/attack as a single stack, so you need to hit actually 3 spells/attacks. Right now for example Bard with Iceborn/Luden can proc Thunderlord with a single attack, Morgana needs 1 sec of her W for same, and so on
TheDiff1 votesThink about champions that have spells that synergize with their AA
Champs like 
just to name a few
BeatzBoyFTW1 votesThat's pretty much the thing. You have listed champions that goes whichever lanes they're going.
Why is Thresh getting TD instead of Bond of Stone? Why is Nasus going TD instead of Strength of the Ages? Why is Tryndamere going TD instead of Fervor of Battle or Warlord's Bloodlust?
Similar to the concept when 
had it's 20% CDR nerfed to 10%, players are picking Thunderlord's Decree no matter what champions & lanes they're going. There was not a single match I've seen where less than 3 people would pick a different Keystone Mastery.
TheDiff1 votesThey're getting TD because Riot nerfed the hell out of all the other good keystones. If you don't get TD the only other keystones worth getting imo are Perseverence, Grasp of the Undying or Windspeakers if you are a utility support.