1

Start with either Sprint Boots, Monster Rounds, or Healing Rite, then get Arcane Surge to give your lane improved Medicinal Specters
Work with your lane partner to secure the objective, don't forget to take boxes at 2 minutes, and generally play defensively until Barrage is available, then coordinate a kill or objective push.

2

As this is primarily a supportive build, you might be feeling a little low in the damage department
Keep investing in cooldown reduction for more turrets and start looking for fights to support your team
If you're allowed, you may farm a side-lane and defend the outer walkers
Don't forget to check the boxes!

3

Use turrets to establish backline fire support for team fights, hold off Walker aggression, or siege objectives
Healing Tempo is extremely good for your turrets and teammates; make sure to arcane surge your specters and call out when you're placing them.

3) Core Finishers

4)

Once the majority of your CORE is finished, decide what kind of role you want to play and look to these categories to build them out
Personally I tend to grab Greater Expansion and Juggernaut, and maybe think of Escalating Exposure for the late game.

4) Damage Core

4) BELOVED

EGO and Current Experiments

Find me on the Deadlock discord, I'm a regular in #mcginnis
I also stream on twitch.tv/zippydasquirrel
Below are items I've been experimenting with lately.

McGinnis SKill build

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McGinnis Build Description

A spirit/support build with a heavy focus on spamming turrets and providing support to your allies.

Latest Updates:
18-Jun: Added Improved Spirit to Turret Phase, minor adjustment to Phase 1 (Others) and Phase 2 (Countering). Not been playing much lately, but the build feels pretty solid.
22-May: Minor annotation edits, added Cultist Sacrifice to Experimental cat.
21-May: Split Rewrote Phase descriptions, added Mystic Slow->Lightning Scroll to core, reordered ability points, split Phase 3 into two cat