I haven't T1ed before, so I could be wrong, but I believe that T1ing a Campaign takes anywhere between 60-120 chains.
That number depends on when the campaign is (is it after a resource depleting TVT?), who the reward is (is it an R6 Megs or Optimus?), and if other rewards are worth it (Is T2 worth anything?).
If I had a guess, I would say this event will end up on the lower side, but I could be wrong. It's after an event that was extremely draining on Energon, which you cannot farm in this event. And Energon is very expensive to buy. That will probably drive scores down a bit. Second, the other rewards in this event are useless as is the H10 boss card. This won't help drive up the scores either. The only other factor is that its Soundwave. I believe he usually demands a bit of a premium (not to the level of Megs or Optimus, but he still causes a bump).