Choose an objective for the next fight
A route can target a useful movement tool, recovery option or attack property. The official page confirms that each defeated Kami grants a distinct skill, so order changes both difficulty and available tools.
Do not compare bosses outside their route context
A boss faced first and the same boss faced last are not equivalent tests. Record the defeated Kami, acquired powers and current route before comparing difficulty with another player.
When to switch routes
If repeated attempts fail at the same readable pattern, practice may be the answer. If your current tools do not support the approach you want, another Kami can provide a different route rather than a simple easier mode.
Local tracker