Kat’s verdictReplace a general when the pair you can actually build improves your useful results enough to justify the extra investment. A ranking at maximum development is not your current march.

Compare realistic pairs

Put your current main and assistant beside the new pair at the stars and specialties you can afford. Keep troop type, equipment and battle conditions comparable. Separate attack, defense, HP and march size. Adding them into one large percentage does not predict a battle.

Write the rebuild budget

The portrait is included. Most of the performance is sold separately.

Check the assistant option first

An effective assistant may offer a cheaper route to improvement. Assistant specialties can contribute, but their ascension attributes and equipment stats do not apply in that role. Dragon requirements can still matter for activating skills. Check the active effects before investing.

Open Tavern → Recruit → Portraits → General Simulation. Select the intended main, assistant and Skill Books to check their combinations without changing your existing generals.

Confirm which skills remain active. The simulation checks skill combinations; it is not proof of a battle result. Verify useful performance with comparable reports when practical.

Give the change a job

Money and materials already spent are history. They are not a reason to keep an inferior setup forever. Compare the additional cost and benefit from today.

Official references: General Simulation, Assistant General rules, Ascension Fragments. These sources document the mechanics discussed. Use current in-game costs and active skill descriptions for your own build; this is a decision guide, not a current general ranking.

Keep the useful parts.
Test the new combination.
Let the portrait wait.