Give Tryndamere a reason to team fight situationally, so he isn't so boring to play against / with.

How about if mocking shout provided damage reduction rather than reduced attack damage but the slow stays the way it is.

Instead of applying an effect that causes 20 / 35 / 50 / 65 / 80 AD reduction on everyone within 400 range for 4 seconds:

Apply a mark which causes 2% / 4% / 6% / 8% / 10% reduced damage output for each ally within 400 range for 4 seconds.

in a 1v1 its just 10% damage reduction for 4 seconds rather than 80 AD reduction. If you tag 3 people with it and they stay close to other then it is potentially 6% / 12% / 18% / 24% / 30% reduced damage output for 4 seconds if they continue to remain clumped up. The most ideal circumstance would be like in dragon pit or baron pit, hitting all 5 people, which would reduced damage output by 50% for 4 seconds assuming they can't spread out and the skill is max rank.

It is considerably weaker in 1v1 now though. 80 AD reduction is basically 20% damage reduction on a 400 AD carry, and 40% damage reduction on a 200 AD bruiser, assuming ad scaling abilities and auto attacks only. Even taking into account base damage, mocking shout's effectivness would go down by atleast half in a 1v1 or 1v2.

That makes him marginally easier to deal with in a split push, and although he is still pretty garbage for most team fights, it gives him a reason to team fight every once in a while when the enemy team is guaranteed to be clumped up, like at baron or dragon.

He is still going to be a pain in the ass to play against and will still split push alot, but atleast now you have windows during which he will want to team fight. You won't be frustrated that he won't help secure baron, or angry that he doesn't do anything other than split push all day; he actually has an excuse to team fight under very specific and infrequent circumstances.

I mean I don't like being forced to split push ALL DAY as Trynd any more than the people I am playing against. I'd like to have the capacity to mix it up with a team fight two or three times a game and not be worse off for it. Until then Trynd players just have to keep splitting, and people who play against Trynd are just going to have to put up with Tryndamere players splitting all day.

Give me an excuse to team fight every once in a while.