I have now full s2 und every s4 honor item. I was wondering what i should do with my arena points. Should I upgrade my s2 weapons to s3 weapons or upgrade my s2 gear to s4?

I remember that u suggested to buy the trinket for heroic marks. But isn't the trinket, which is dropping in tdm, better? It is proccing quite often and the epertise is nice too. So which is the best trinket that I can get?

I'd say upgrade your weapons, then your armor if your rating allows it which from your wordings seems like it does.

Trinket wise I assume you're comparing Shard of Contempt and Bloodlust Brooch. Stick with the shard, but if you come across something like Madness of the Betrayer(Black Temple) or Berserker's Call(Zul'Aman) then use one of those.

Quite frankly either of those arena point expenditures are going to be massive upgrades for you.

If you can quickly attain the rating go with the weapons, other wise just get the gear as you ascend the rating hierarchy. Both are massive upgrades and will only further increase your ability to get more points each week by getting the high tiered gear quicker.