I’ll cut to the chase: Weapon Throw is bad.
It was bad before (a WT-centric build in competent hands was clearing around GR 100 at 3.5k paragon), and it will be bad still (the buffs to the two spears add 11 tiers of damage, meaning we’ve moved up from GR 100 to 111).
So, on its own, the skill/build is very underpowered. And as a component of Raekor, it doesn’t fit at all. It doesn’t benefit from the Raekor 4 piece or 6 piece damage bonuses, and does a far worse job than Charge at generating the two things you need to deal damage, Fury (poorly) and R6 stacks (not at all).
The way I see it, there are basically three paths forward from here.
PATH #1: DO NOTHING
This is exactly what it sounds like. No further changes or buffs to Weapon Throw.
The result of following this path is that Weapon Throw will continue to be a mostly unused skill, except for a few “just for fun” builds played by afficionados.
PATH #2: INCORPORATION INTO RAEKOR
This path involves somehow making the Weapon Throw skill into an integral part of the Raekor set. Obviously, it is not that now. But, what role could it fulfill?
Well, one possibility is that they take out the “missing life damage bonus” which some people (including myself) think is interesting and cool, but many others really don’t like. And just replace it with a Weapon Throw debuff on mobs: “Enemies hit by Weapon Throw take 200% increased damage from Ancient Spear” (for some amount of time, I suppose… 8 seconds?).
This of course would mean that you basically must take Weapon Throw in order to play competitively. And the new cycle of play would be: Charge around to build R6 stacks, then debuff mobs with Weapon Throw, then hit them with Spear (probably Boulder Toss).
Another alternative is that Weapon Throw could be part of a R6 Spear setup that is separate and different from the Charge / Boulder Toss one. With a few adjustments, you could have a Weapon Throw / Jagged Edge setup that plays purely at range:
Add to Raekor 4 piece: Hitting Enemies with Weapon Throw increases the attack speed of Ancient Spear and Weapon Throw by 10% for 8 seconds. This stacks up to 10 times.
Add to Raekor 6 piece: Hitting enemies with Furious Charge or Weapon Throw increases the damage of your next Ancient Spear by 5500% and causes it to release multiple spears from its target.
And adjust Arreat’s Law: Weapon Throw generates up to 75 additional Fury based on the distance of the enemy hit.
This would allow Weapon Throw to build R6 Stacks and generate considerably more Fury, while applying a significant speed-based damage bonus to Ancient Spear. This would mainly help the runes other than Boulder Toss, since BT consumes all Fury with each hit, meaning attack speed is really not a factor in its damage. The result would be two different playstyles for the set: one based on lots of Charging plus Boulder Toss, and another based on staying at range, and hitting with Weapon Throw plus, probably, Jagged Edge.
So, there you have two options for integration of WT into Raekor: the “WT debuff” and the “mostly ranged playstyle”. There are, of course, many other possibilities. But the bottom line is: if WT is going to be part of a Raekor build, it’s got to do something.
PATH #3: FURTHER BUFFS TO IK/LOD WEAPON THROW BUILDS
This path involves adding more damage to Weapon Throw either via number increases or via new items/mechanics. To get to a spot where it is really considered playable, which I would say is doing around GR 130 at 3.5k paragon, IK/LoD Weapon Throw needs at least 19 tiers more damage (beyond the +11 it is already getting). For comparison, this would make it roughly comparable in power to Pro-Slam, which sees limited play these days due to low power. And, to get +19 tiers, you need about a 20x (+1900%) multiplier.
That could be split up in different ways, of course: as a single 20x multiplier, or as 4x + 5x, or as 3x + 3x + 2.25x… you get the idea.
The simplest way to do it would be to just massively increase only the Weapon Throw % on both Arreat’s Law and 300th Spear. But, to get to the required 20x more damage, we would need both to have a +1300% bonus to Weapon Throw on each ( (14*14) / (3 * 3) = 21.78), which is maybe too large a number.
You could have both at +800%, which is not unprecedented (Gavel, Remorseless, Tribes, are all around this range), and then add another item that helps the build, either through another number increase (2.25x / +125% would be what is still needed), or a new mechanical effect (Weapon Throw splits when it crits, or it pierces, or it pulls enemies into a tight grouping, etc). We have several items, for instance Saffron Wrap and Skull of Resonance, that are never used. Either of those could be reworked to provide a beneficial effect. In addition, we also have two powers- Revenge and Overpower- which are not part of any set or significant build. It would be cool to see one or both of those synergizing with Weapon Throw (or even with all Primary attacks) in some way.
The bottom line, though, is that however you slice it, Weapon Throw needs MORE DAMAGE if it is going to be the centerpiece of an IK or LoD build.