Improve a published defense by checking the version you published, then reviewing how challengers beat it. Fix a repeatable weakness in positioning, defense coverage or resources and publish the revised build for another comparison.
Give the published machine a repeatable plan
A build should reach the distance its weapons need without relying on an accidental opening. Pair the Brain with the intended range, and check that the body can supply the equipment and turn when the opponent changes sides.
Defense is still a matchup, so a machine with one clear plan will have counters. Your goal is to make that plan function reliably, then understand what beats it. Adding more unrelated mechanics can create weight and energy problems without closing the main weakness.
Review the moment the plan fails
Use the defense log to look for repeated patterns: mobility destroyed early, projectile pressure reflected, rear exposure after Dash or weapons waiting on energy. A single final score cannot distinguish these causes.
Arena uses normalized attachment levels. If an attachment repeatedly breaks, think about its base durability, position in the damage interaction and supporting defense rather than assuming a Campaign upgrade will carry over.
Publish one deliberate revision
Change the part or rule most directly tied to the repeated failure. Then verify that the revised build is the published version before interpreting later defenses. Otherwise you can mistake an old machine’s result for evidence about a new idea.
Do not optimize around one unfamiliar result alone. Compare several different matchups when available and note whether the new defense introduces another weakness. A build that stops a saw rush may become less effective against a beam plan; keep the tradeoff visible when choosing what to publish.