Convergence

Description
A Focus centered around manipulation, increasing, and  stacks.

Strategy and Synergy
Most Convergence spells are support spells so it's best to use them alongside spells from a different Focus.

A lot of the mana based Convergence spells can help alleviate low issues making spell casting more efficient.

Trivia
Convergence's slogan is a reference to the phrase "One for all, all for one" which was popularized by the 1844 French novel The Three Musketeers written by Alexandre Dumas.