If you are a developer:
If you are just short (e.g., at 4650 mana), let the game run; the faction has mana growth that scales with playtime, which can eventually push you to the exact target. Standard Build (G00F's Not a Wiki recommendation) : mana matrix realm grinder guide
In Ascension 3, use the Mercenary faction with the "Eternal Matrix" facet. This allows you to have every single faction upgrade active simultaneously. You will need a Matrix Mana pool of over 1 Trillion to activate this, which requires a full week of dedicated Matrix Conflux farming. If you are a developer: If you are just short (e
Once you have 3 facets, do not go for a 4th. Instead, fill the support nodes around your spine. These are small, 10-20% boosts that stack multiplicatively: at 4650 mana)