its all about ults in this ana build
Item purchase order
Round 1
[Nano Boost] also affects other allies in your line of sight, but it has a 25% reduced duration on them.
1,500 
1,000 
1,000 Round 2
1,500 1,000 1,000 
[Nano Boost] can target allies through walls and its range is increased to 60m.
9,000 Round 3
[Nano Boost] also grants the target 35% Ultimate Charge and 200 Overhealth.
4,000 1,000 1,000 Round 4
1,000 
4,000 
Ability Damage and Healing grants 20% more Ultimate Charge.
10,000 Round 5
[Nano Boost] also applies to yourself for 100% of its duration.
1,000 
When you die, gain 15% Ultimate Charge.
1,500 
When you use an ability, gain 5% Weapon Power for 3s, stacking up to 3 times.
11,000 Round 6
here and round seven you can chose to sell the common and rare items for a more generic build
Round 7
Gain 50 Health. When you apply Sleep to an enemy, gain 10 Health, up to 150.
you can choose whatever power you like here i usually like either venomous for faster ults or sleep regimen for more survivability
