Uwashiwali Bird
Uwashiwali Bird adds a proactive Heal to an otherwise reactive build. Even with just two Multicast, it's still a reliable source of Heal that has the potential to trigger
Weights twice.
While the Restorative
Caltrops will do most of the heavy lifting, it's never a bad thing to have extra Heals, especially against the builds that don't have as many moving parts. Without
Uwashiwali Bird, it's a lot harder to scale up against slower opponents.
Spices
Spices gives a one-time power spike by effectively doubling the current Damage of
Caltrops. An eight second Cooldown can be a long time to wait, but that's actually beneficial. This allows more time for
Weights to scale, meaning by the time
Spices can trigger, its doubling capabilities will be far more impactful.
Overall, you won't usually need more Damage beyond what
Weights +
Caltrops already provides. However, it's a nice tech against Max Health or Shield stacking builds to ensure you have enough Damage to punch through.
ATM
ATM simply fills the slot as a Medium-sized Property. Its only real purpose is to give Multicast to
Uwashiwali Bird, though it does add a bit of extra defense with its Shield.
As a low Cooldown Shield item, it does open the door for skill support. With the right skills, it has the potential to scale to a respectable amount. Just be aware that skills like
Defensive Stance won't work, as
Caltrops doesn't actually count itself as being "used".
Staying Power
Staying Power may look rather underwhelming on the surface, but where its true power lies is alongside
Weights. Since
Weights itself is a Tool, it can proc the skill when used, and that little Heal can trigger the Charge effect (so long as you're at Max Health).
As a skill available as early as Bronze, this is an easy pickup that adds a ton of synergy to the build. The actual Heal amount is irrelevant, only the trigger matters. So there's no need to worry about upgrading it in the future.
Re-Tooled
Re-Tooled is a crazy powerful Diamond skill that gives Multicast to your leftmost Tool. This is the icing on the cake that makes the build absolutely busted.
Weights now triggers twice each use, triggering
Staying Power twice, which potentially Charges itself twice, and so on and so forth.
The synergy with this build is insane, and definitely a priority Diamond skill to look out for when you reach level 14 (Diamond skill level-up reward).