• Buzzer can be build in many ways because he's already efficient enough with his crowd control skills :
  
  Power Shot: a (long range) stun ability which make him really essential in a party (as is Kati Sagan of course). Make sure to always stun interrupt the boss while he is channeling his spells.
  
  Rigged Decoy: an AoE taunt with a little slowing aftereffect. When no bruisers are in the party, max this spell first to lower the cooldown. Like Power Shot, this is a key ability, don't spam it.
  
  Acid Rain: a big slowing AoE which turns into a root ability while building up a lot of Tech Power (TP) later in the game. Also reduce healing and regeneration so use it on mobs when the enemy healer is surrounded and may cast heals.
  
  
  
• If you'r familiar with MOBA games like DotA you can see Buzzer as an 'hard carry' if you want to play him as a DPS character : without natural steroid ability like Kati's 'Lockdown' he's not as reliable as she to deal damage on duration.
  
  
• He's a fantastic burst damage dealer with an hybrid build though.
  3-Rad-Icator and Haglebreaker II let you to build a fantastic amount of TP and AD while Bofors 75 Plasma add additional damage on top of your first shot, thus, in combination with his passive, making him able to one-shot many weak targets.
  
  
• However the purpose of this build is to focus on his ultimate skill Hyper Discharge to deal damage on a large group of enemies, which is pretty efficient for crowd controls, especially on the hardest difficulty mode where being overwhelmed can make the situation hardly manageable. With this build you will be able to often eliminate champions whereas standart Buzzers's ultimate may leave them alive. Also, this build don't need an huge amount of offensive stats, letting you to focus on survivability (and you want to survive the Mayor Mayhem's wave), especially on hardest difficulty mode.
  
  
• Here are the ratios for Hyper Discharge:
  
  
  Attack Damage

  Tech Power

  x 2

  x 4
  
  
  Level of Hyper Discharge

  Energy ratio

  1

  x 0.75

  2

  x 1.5

  3

  x 2.25

  4

  x 3

  5

  x 3.75

Starting item: Intact Battery Pack


As you begin with a low amount of energy earlier you may run out of energy very soon. Buying this item first will let you to use more frequently your abilities. This is a fantastic starting item because it also adds one of the best passive earlier in the game: when energy tap applies to an enemy (you can see the debuff on the mob, surrounded by a blue circle), all allies attacking this enemy profit from the mana regen. This is particulary useful when you don't have a Kati Sagan in your team (as her ultimate also applies energy tap on enemies). As Hyper Discharge damage depend on your current energy, you want to be full of energy before using your ultimate! Of course, the nice amount of energy make your ultimate more powerful from the level 4.

Magnified Mosquito Field


This is the natural evolution of Intact Battery Pack. more energy and more TP for more damage on your ultimate. TP also make other skills more efficient. You gain another nice passive, which would be usefull later in the game, giving you up to 20% armor in total with a single item. Not bad.

Lansman's Boots


This is your true core item because of his active. The trick is simple. Each time before using your ultimate, use your active. This will make your energy ball to crit for sure, doubling the damage! (if you didn't know already, damage skills can crit in this game). The cooldown of the active share almost the same time as the Hyper Discharge, so make sure to always use your active in combination of your ultimate. The movement speed bonus is also another great addition because Buzzer has no movement skill. Avoiding Mayor Mayhem's mortar shots will be a bit more confortable. You can buy it before upgrading Intact Battery Pack into Magnified Mosquito Field.

Rustic AC


I like this item because it is offensive and defensive in the same time. But I think this is a situational item, it really depends on your partners. Still a good choice because its evolution synergizes notably well with this build.

E.T-Shirt


Again, another great offensive and defensive cheap item making your stacking amount of energy even more profitable! Remember: you want to survive, so build HP! Will be upgraded later.

Matrix Coating


Matrix Coating is build from the E.T-Shirt. This will add a huge amount of HP, houra! Also the energy given by this item is considerable! MOAR DAMAGE MOAR

Alfred's DynaVisor™


I love this item and I recommend it in all tech build, especially for this one. Again, energy, HP and the most important things to have later in game: more armor giving you around 30% of armor in combination with Magnified Mosquito Field (remember diminishing returns begin from 25%) AND a nice reduction of negative effects on you, mainly deadly stun and nasty movement speed debuff. And the cherry on the cake: a nice active.

Defensive choices:

Rimfrost AC-2.0


This is a really optional. The passives and actives are useful if you'r not confident on your team, and in particular on your Bruiser's job. This is a bit redundant with your skills, so it's up to you but the stats are still nice.

Underside power Armour


If you'r for armor, there is a good value on this item. But because of diminishing returns, you may skip it and go for armor implants late game.

The Black


Synergizes with your amount of HP. The definitely HP choice. Also make healing from healer characters more efficient on you.

Mix between defense and offense:

Curse Clan Idol


This item give a good amount of offensive stats for your Genki Dama but still remains useful to survive with his handy passive. With this insane amount of energy you will replenish your health bar in critical situations. Make sure to use Matrix Coat active to get some of your energy back just after that. Deflect Chance is really welcome, since you can't buy this stat with implants after being full stuff.

Offensive choices:

B2 Power Rod


Getting so much amount of energy and not getting Power Rod will be sad! The definite endgame boost for your attack as your ultimate.

Machine That Goes Ping


Very expensive but give your abilities a nice boost.

Frikken Kritten Mitten


If you focus only on your Hyper Discharge this is the best item to finish your build so far. Forget the passive, you just want your +50% Crit Damage. This adds around 8.5k damage to your energy ball with a full build and a level 20. Also the Crit Chance is really welcome.

1. Use your taunt ability in a corridor.
2. Use Lansman's Boots active.
3. Press R. You'r now gathering energy from all surrounding life forms.
4. Profit.

N.B: The user must have a pure heart or the move can backfire.

Numbers.

Thanks for reading me! Feel free to correct my grammar, add recommendations, ... or discuss about anything about the game.
Thanks you devs for making such an entertaining game!