Magnetize is one of the highest damaging abilities in the game after it's been set up. We combine this with some armor stripping from either Polarize or [Fracturing Crush] and a damage buffing subsumed ability to deal with extremely powerful singular enemies that are susceptible to Magnetize. This is not a nuke build. It's for min-bosses not groups.

Roar is chosen because it double dips with the damage you're putting into the Magnetize bubble and the bubble itself. Other powerful damage buffs like Eclipse and [Xata]'s Whisper can also work to quickly increase the damage of the bubble.

Elemental buffs like Nourish, Smite, and Shock can be used to save slots on your weapons and to save slots for even more base damage. Hybrid offensive/defensive buffs like Elemental Ward or Warcry also work in this build but aren't necessarily going to synergize with Magnetize.

Crush or Pull should be replaced depending on whether you're going to use the additional armor strip from [Fracturing Crush]. [Counter Pulse] should be replaced for any other augments needed for the build or if the enemy you're fighting is immune to the effects.

[Corrosive Projection] helps you to deal with the "boss" style enemy you're using this build to counter. Any other Aura can be used if that enemy doesn't have armor or if you're using Shuriken and its augment.

Arcane Aegis allows you to spam Polarize or other abilities in conjunction with an Augur mod to stall until it procs. It can be replaced with any other arcane of your choice to suit your playstyle.