Hi iac249. You might find useful.
Thanks. I also found this under performance tips in the manual:
[quote:8of65nab]Not placing all used objects in the layout
If objects are not placed in a layout but are created by events, Construct 2 will load the textures for those objects the moment you create them. This can cause a momentary pause or "jank" and make the game feel less responsive. This can be avoided by placing any used objects in the layout. They can be placed off-screen and destroyed on startup to avoid interfering with the gameplay. Then Construct 2 will preload all their textures when the layout starts, avoiding any "jank" as they are created and destroyed at runtime.
Since there will be many levels and not all mobs are encountered at every level, it seems better to break them up into specific sprites instead of one with all the animations attached to prevent unneeded animations from being loaded into memory.