I

Extra Regen

If you need it earlier than expected (You usually buy this for Healing Booster)

I

Extra Charge

If you need more grenades for T2 heal

I

Restorative Shot

If you need EVEN more heal early on

III

Rapid Recharge

This is your grenade's power spike, rush after you get Quicksilver

III

Point Blank

Great for close range playstyle with bruiser-like fighting

IV

Active

Vampiric Burst

Greatly increase sustain + Fire rate boost

IV

Imbue

Mercurial Magnum

Makes your gun also deal spirit damage alongside, allowing you to take good advantage of the 4.8k spirit investment bonus while getting more benefit from Leech

II

Intensifying Magazine

Cheap source of damage buff, can be sold if you can buy a better gun damage item

III

Hollow Point

For traditional gunner playstyle where you sit in the middle of the pack

III

Berserker

For tank gunner playstyle where you eat dust and bite back

III

Hunter's Aura

For roamer 1v1 playstyle where you go hunt weak jungle farmers

IV

Frenzy

The numbers ain't much, but the bonuses it gives are tremendous for tank gunners

IV

Glass Cannon

This has enough juice to make your gun hits like a truck

III

Tankbuster

Allows your grenade to bust through tanky opponents

III

Imbue

Surge of Power

Gives flat spirit boost, fire rate and fleetfoot effect (no slow resist though)

IV

Imbue

Mystic Reverb

It isn't just extra damage, but also slow your foes down enough so your gun can finish them off

III

Active

Healing Nova

Recommended for deathball fights, allows you to heal your whole team

III

Active

Rescue Beam

Recommended for a more support-y playstyle, allow you to pull someone out of the deathball quicksand

II

Active

Guardian Ward

Great for mobile support or fighting by yourself

IV

Active

Divine Barrier

3 times the barriers, 4 times the price (WHAT?)

III

Bullet Resilience

Too many bullets flying toward your direction?

III

Spirit Resilience

Too much Spirit damage?

III

Active

Debuff Remover

If the debuffs become unbearable or there're life threatening ones, buy this

III

Counterspell

If enemy has burst spirit damage/annoying abilities and are predictable

III

Active

Warp Stone

You need to escape

IV

Spellbreaker

Massive burst spirit damage dampener

IV

Plated Armor

Can help against gunner late-game

IV

Juggernaut

If you're constantly being bombarded with slow CC and bullets, this is the best choice

II

Healbane

If enemy has too much sustain mid-game, you might need this

III

Active

Knockdown

"Man I need something to send flyers down"

III

Superior Duration

This can help extend your dome/ice path

III

Superior Cooldown

If you need better CDR for *just* dome and ice path

IV

Transcendent Cooldown

If you need CDR for everything with a cooldown

IV

Active

Curse

"Screw this guy in particular"

IV

Armor Piercing Rounds

They have armor?

IV

Healing Tempo

More heal, faster move speed and more fire rate

IV

Inhibitor

"Man if only I can reduce their damage somehow"