You can save some money from buying mana pots. Tome: Concentration - This skill will help you summon more Spider Mines.Tome: Blocking - Increase your characters chance to block with a shield.Tome: Animal Handling - Permanently boost the power of your pet and minions.You need this skill passive since you tank enemy punishments. Charge Reconstitution (14 Skill Points): Your another source of healing.The more enemies attacking you, the more chance you proc this passive skill. Aegis of Fate (1 Skill Point): Just like Charge Domination, you only need 1 point for this skill.The skill is really helpful during higher level or difficulty. Just summon this once and it can slow down multiple enemies. Immobilization Copter (15 Skill Points): The drone debuffs like Onslaught with an extra chance to interrupt foes.The AOE (Area of Effect) of this skill is huge that is hits almost all foes in your screen. Tremor (15 Skill Points): This skill is your ultimate debuff mainly weakening enemies around so that your summon bots can deal more damage.Mana and skill point wise, I only put 10 for this. Consuming charges also heals your Engineer from Charge Reconstitution. More charges powers up your Forcefield, and Tremor. Dynamo Field (10 Skill Points): Use this skill to quickly generate charge.Whether for your pet, minion, party, or you, this skill is one of the best defensive buffs especially for team. DonвЂ™t go to battlefield without casting this skill first. Forcefield (15 Skill Points): The damage absorption of this skill is really helpful.You get chances to proc this skill the more enemies around so donвЂ™t waste extra points. ItвЂ™s also good for your Charge Reconstitution. Charge Domination (1 Skill Points): The passive skill can help you fill up charge quickly to power up Forcefield or Tremor.Tip: Because of the longer cooldown of both Gun Bot and Sledgebot, it is best to alternately summon them so that you always have a powerful companion available. The summon also buffs all damage and all armor. Sledgebot (15 Skill Points): Engineers ultimate Bot! The skill summons a gigantic melee robot that sweeps, smash, and fire rockets.Gun Bot (15 Skill Points): My personal favorite, this summon provides powerful fire support to multiple enemies.It automatically tracks the enemy and explodes on contact. Spider Mines (15 Skill Points): This is your main summon for damaging enemies.ItвЂ™s already available at level 1 so you can save early since you buy lesser potions. Provides healing, mana regeneration, and bonus armor. Healing Bot (15 Skill Points): Your first summon skill.Onslaught (1 Skill Point): You mainly use this skill for debuffing, dashing, or escaping enemies.Vitality (395 Stat Points): The main stat for this build, vitality increases maximum health, armor, and chance to block with shield.Dexterity (100 Stat Points): Put some few points here to increase your dodge and fumble recovery.

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