[Hunter Synergy] + [Tenacious Bond] is OPTIONAL for +120% flat crit multiplier. NOTE: Without running [Bite], you MUST be holding a Primary Weapon with minimum 133% crit chance after mods, which requires a base CC of 44% + Critical Delay without a Riven (Kuva Chakkurr, Prisma Lenz, Paris/[Paris Prime], [Dread]).

[Tandem Bond] is OPTIONAL for allowing passive melee combo gain (useful for [Baruuk], [Gara], Excal, [Khora] etc).

[Seismic Bond] is OPTIONAL for when you are using a chanelling ability, giving you a free 30% efficiency.

Mecha Set is OPTIONAL for mecha status based warframe builds (e.g. pair with [Lavos], [Protea])