I don't always get the exact same things every time, it's best to adjust for scenarios, but usually this is roughly what i'll aim for.
Item purchase order
Round 1
Eliminations reset your cooldowns.
1,000 
Health Packs grant 20% Move Speed for 5s and 50 Overhealth.
1,500 
1,000 100% starting this every time. allows you to get early picks and get out safely, and be able to overextend a bit more if you play around healthpacks.
Round 2
While at full Life, Lifesteal grants up to 100 Overhealth.
10,000 Can sell adrenaline shot if need be. If you still can't afford it, get 2 blue weapon items in its place (technoleech and after-market firing pin is a solid choices) Green sell order if needing extra money: Adrenaline shot 1st, compensator 2nd, Plasma Converter 3rd
Round 3
Using [Wraith Form] increases the number of pellets per shot in your next magazine by 25% and its spread by 50%.
When you use an ability, gain 10% Move Speed for 2s.
11,000 The third round can vary, you can optionally get vanadium injection if needing survivability and ults not feeling useful (purple survival, 10k), or El-Sa'Ka surpressor for antiheals (purple weapon, 11k), or if you're doing well financially, send it on Eye of the Spider (purple weapon, 14k). if you need tankbusting by this time, can get both shieldbuster (blue weapon, 4k) and codebreaker (purple weapon, 9k), but this doesn't work for JQ, which instead just stick with booster jets. If you ever don't have enough money for a purple weapon, I'd recommend trying to get Talon Modification Module (blue weapon, 6k), technoleech (blue weapon, 4.5k), After-Market firing pin (blue weapon, 3.75k) and Spectral Slugs (blue weapon reaper unique, 4k). the blues aren't in a particular order just get what you can afford but try prioritise purple items first. Green sell order if needing extra money: Adrenaline shot 1st, compensator 2nd, Plasma Converter 3rd
Round 4
Deal 10% increased damage to enemies below 30%% Life.
14,000 Refer to round 3 notes.
Round 5
+30% [Shadow Step] Cast Speed. After using [Shadow Step], double your Lifesteal for 3s.
Health Packs grant 20% Move Speed for 5s and 50 Overhealth.
1,500 
Critical Hits apply 30% Healing Reduction to the target for 2s.
11,000 Refer to round 3 notes.
Round 6
1,000 
While at 100%% Ultimate Charge, gain:
10,000 Refer to round 3 notes. (if this is when you buy Vanadium injection, remember to NOT use your ult, since ulting removes the bonus stats)
Round 7
While in [Wraith Form], restore 7% of your Life every 1s. Double this while below 50% Life.
1,000 
Critical Hits reveal the target for 3s.
14,500 Refer to round 3 notes. The last power on round 7 can be flex, whether you need wraith renewal for extra sustain, silent as the grave if making stealth plays, harvest fest for sustain and ammo (good if playing mid range at first then engaging and using the soul as a DIY health pack), or Ghosted if needing anti attack speed (or need to slow down fast targets like soldier 76)
