Spoiler:
Firstly I thought about buffs for this tree which won't buff other trees because most of community think sw (macaroni-monster) is okay. But melee tree is not okay. Really.
If we'll take a look at tree, tactics and skills it may looks like ok, but it is not (you and your party will lose 80% of fights while using it I swear).
This stance is completely useless for any kind of party. Simply because it has nothing to offer.
Explaining:
So what we REALLY have in this tree:
Strong dot, knock (if you learned it), disarm and...
Armor - its okay, we have pretty enough physical damage mitigation. But it's not enough for general defense since:
We have no resistance, no wounds and no self-heal benefits. One armor debuff or burst from sorc/magus - we are dead deadly. Then the simple question pops up: maybe SW is just a glass cannon assist-machine with hell-dmg and have no real need in defense? Not really.
Our melee damage has not enough burst potential since Brutal Assault even with tactic cannot give us it because of 5 sec cooldown (so we are inferior to WHs) then if we try to punch our opponent to death with our Grim Slash our AP ends very soon even with help of party (especially when we must slot Leading shots for party and have no place for ap tactics). To sum up there are no burst potential and no dps potential as well especially when in most cases sw dies in melee in 5-10 sec depends on the opponents.
And of course as I stated at first place we have 0 benefits for the party (from this tree/build) and it is a general problem since solo viability of a class/tree has no real importance.
Proposals:
Honestly I don't have any solid solutions, just some experimental ideas:
General is to make Shadow Warrior an Assault meleetrain party-maker.
(There is a list of various ideas if at least one of them may be liked by moderators and community it would be nice)
1) Make tactic No Respite an aoe-buff but decrease its range for 20-30ft to prevent SWs run around BWs while they own enemy lines from 100ft. < but there is a problem from technical side: I don't know is it possible to make this tactics' aoe-buff activates only when SW is near his enemy.
Btw this change may make SWs run into battle with other melee carries and buff their dmg. Kamikaze mode.
OR
2) Make tactic Wrist Slash same party aoe-buff mechanic but I don't really fond of it since Order already has WS buff from Slayers.
OR
3) Make skill Sweeping Slash an aoe cooldown debuff. I don't really like it too because same reason as the one ^ (Slayer/SM).
OR
4) From the other way make Sweeping Slash an aoe armor debuff, for example, 400 points ( Acid arrow has 618 so its fair scale for me).
OR
5) And again Sweeping Slash: grant it an aoe-crit debuff (same as BG's one).
As we know Kotbs and SMs are mostly party buffers and tanks, SWs may become active dps party buffers/debuffers since they already have AP-regen buff (which isn't really good) and Crit chance buff (which isn't really good too since doesn't buff SW itself but anyway good for party).
Unimportant attachment about tree in general (not about party so you can ignore it):
Spoiler:
