I'm a tad worried about powercreep, so I wouldn't want to have t85 weapons that would just be a straight upgrade to elemental weapons. In general I think it's a very bad idea to release weapons that'll eat other weapons' lunch. Giving us more "useless" weapons isn't a good idea.
NOTHING
In my opinion these new weapons should be 1-handed special attack weapons that would be designed to be good for PvM. There are only two special attack weapons really viable for PvM and it would be nice to have more variety. Of course it would have to have a different effect than swh or sgs. I have a few ideas for them.
BUT
These weapons just make other weapons useless.
SINKS
But does it really have to be tier 85? I mean if it's tier 85, of course it has to be someway better than the rest of the weapons. Can't we just add these weapons as tier 75 weapons (mostly used for their special attack)?
It wouldn't really matter, Thomy just talked about that tier.
Weapons that would reduce monsters stats would be great. Also why not weapons that would buff your own stats? E.g. the special attack would activate a rage mode for yourself for 10 sec or something like that.
Might be interesting, but beyond stat buffs that potions already give us I think it might be hard to code. Also stake bugs, lol.
DoTs similiar to morrigan's javelin? I don't think we need another similiar weapon?
Damage over time effects can be implemented in different ways. But you have a valid point.
I don't know if I understand the execution right, but do you mean that the special attack would 100% deal certain amount of damage? If that's the case, I would suggest around 50 DMG for 80% spec attack. If the DMG would be at 200, or even 100, you could just get some alt. accounts and go farm some bosses. I don't think we want anything like that, do we?
May not have been specific enough. This would only work if the boss is at the hp the weapon executes. You can already mass spec a boss pretty easily, it should be used rather than abused though. Maybe a % of hp it executes from?
Maybe a special attack that would make the monster asleep for 5 seconds so that you could get prepared again or move to the right spot?
Might be interesting but don't think it would save time over dealing damage or reducing damage. Sgs would probably do a better job for sustain. Would also be kind of boring to use, since it essentially takes out mechanics for a few seconds.
A special attack that would give yourself a shield, let's say for 30 hp?
Shield for what you hit briefly sounds interesting. If you want it to compete with sgs it should have around a 25% spec cost and be quite accurate.
A special attack that can spawn a minion for youself?
Doesn't sound very interesting to me. Minion AI would likely be kind of stupid. It'd basically be like the god arrows passive in terms of adding damage but instead you wouldn't have full control over it.
A special attack dealing multi area damage?
As much as I'd like this there aren't very many places this would shine if it's not spammable. Making the weapon's normal attacks AoE might be interesting though.