I'm not anticipating getting many TM's as the excitement around raids will probably die down after everyone gets their 7th Tyranitar :-\ so it'll be hard to find enough raiders to beat the big bosses and gather many more TM's.
This will not happen so soon. The bottleneck are candy. Even with 7 Tyranitar, you have got 70 candy, thus, one Level 30 Tyranitar.
Assumptions for this:
(1) Universal Candies not used but saved for legendaries
(2) Used normal or golden razz-Berries, because escape rate is to high for pinaps.
In other words, I don't want to waste it!
Neither will i, because i fear, niantic will lower the TM-rate. Until now i only used 1 TM to get rid of Firestorm on my 100%-Tyranitar.
So, would KC/DP or KC/ClC be a good combination? How does KC perform in battle, compared with Counter, against Blissey/Snorlax/Tyranitar/Lapras, which I gather are his main uses?
You can use Pokebattler
https://www.pokebattler.com/fights
to simulate it. I would be glad to read your results.