Let's say:
- "A" tactic gives your team about 100 attacks per match.
- "B" tactic gives your team about 50 attacks per match.
It's obvious that with "A" tactic you will score more by using "the long throw-ins exploit" per match than with "B" tactic because with "A" tactic your team gets almost twice more attacks per match than with "B" tactic.
So "the long throw-ins exploit" might give different amount of "extra" goals to different tactics but it scales equally the attack of different tactics.
Speaking other words, "the long throw-ins exploit" boosts the attack of any tactic approximately by 30% and it's as simple as that.
P.S. some time ago I found another set-piece exploit that is also very efficient but I decided not to share it until somebody else find it but I see that so far no one has found or maybe someone found it but not shared it… anyway… Guys, I just want to let you know that there's another powerful set pieces exploit in the game and if no one will find it then I probably share it only just before the release of FM 2020