Start with prioritizing weapon power then getting valk, then getting res off. All of this to charge Valk as fast as possible
Item purchase order
Round 1
[Caduceus Staff] chains to your previous target for 3s, at 50% effectiveness.
1,500 
1,000 
1,000 Threads of fate is a must-pick for more ult-charge, pocketing capabilities, and more reach.
Round 2
3,750 
5,500 Round 2 is very dependent on how much cash you have. Generally you have two options - to go for weapon power or 15% damage boost. Talon Modification Module is also very viable.
Round 3
While [Valkyrie] is active, the healing and damage boost of [Caduceus Staff] are automatically applied to nearby allies.
1,500 3,750 1,000 5,500 Crepuscular Circle is crucial to get round 3 as you can get more cash and makes Valkyrie much more powerful. Building up weapon power/speed can charge your ult even faster, but if you have a lot of faith in your team's damage capabilities going for 15% Damage Boost is good too.
Round 4
1,000 
While healing an ally below 50%% Life with your Weapon, deal 15% increased Weapon Healing.
11,000 
Convert 100 Health into Armor.
4,000 1,000 5,500 In round 4 it really depends on what your team needs at this point and how much cash you have. What do you need more: damage boost, survivability/reach, healing? Amari's Antidote usually feels crucial at this point but sometimes you'll be low on cash.
Round 5
After succesfully using [Resurrect], activate [Valkyrie] for 5s.
5,500 Round 5: the power Renaissance can help charge your Valk even more. Having the extra armor from Vital-E-Tee is crucial at this point. With Renaissance I always get Resurrection Rangefinder.
Round 6
1,000 
When you use an ability, gain 5% Weapon Power for 3s, stacking up to 3 times.
11,000 Round 6 it becomes hard to really outheal much, again depends but I start putting things into survivability/CD reduction to get off the res.
Round 7
Allies boosted by [Caduceus Staff] gain 20% Lifesteal.
When you use an ability, gain 5% Weapon Power for 3s, stacking up to 3 times.
11,000 
When you take damage, gain 0% Damage Reduction for 1s, stacking up to 20 times.
11,000 Opting for Damage Reduction at this point. Power can be Distortion (Lifesteal), Protective Beam (damage reduction) or First responder (Resurrect gives 250 overhealth).
