The secret for getting more TM.
With collected 1600 raid data, all after drop rate change, here is the secret.
Two level 30-35 same team partners fight a level 3 or 4 raid, which the gym is owned by the same team, with damage ratio within 60:40. One person will get at least a TM, often 2. The other person may or may not get a TM but will get 4+ rare candies.
Solo gets less TM although it is harder.
Answers
I received three today.
On Blastoise I got 2 charged. It was a mystic gym however I was the minority. There was only one other mystic and three valors and instincts. While I am pretty good, I doubt I out DPS'd them like that.
On Charizard I was the only mystic. It was a yellow gym. I Fourtunately pulled a fast one. I was very happy. Its been a week or so since getting any. Oh and I pinap'd the Zard but he had junk stats.
I honestly think it's random...I don't have 1600 raid data, but other than getting more the 1st 2 days, and 0 now, I was doing damage from 1 free ball to 3 free balls...
A good test would be seeing extremely low level raiders who do zilch damage and see if they get TMs...if they do, then any "damage" requirement is out the window...