Alright so i am trying to keep my planets all mine after a recent loss.
So i have researched all planetary def builds and all cloak builds, Which is a better route to take when trying to minimize the chance of losing it. Keep in mind i am talking about for production planets not storage planets.
For Example VL 16x Toxics
VL Exottic 5x7x6x
All planets inmind are VL and greater with at least 5x production

depends on the planet.

some arent worth any defense at all.
some maybe just a barrier or two to keep the low ranks away.
the really good ones that are decent size id perma cloak like a storage planet.

would need examples to be more specific as i dont believe there really is one answer.

original message updated, though question not answered

If it is a maxed out planet, or one you plan to upgrade, it is better to cloak it. That is the only way it will ever be truly safe. Even if you have 50k+ defense on your world a legion can simply take turns trying to invade until someone gets lucky. It requires a ton of npcing to get interspatial fold generators, and magnetosphere chargers to get the passive cloak up, plus lots of non-researchable cloak structures. This limits how many planets you can make completely disappear so choose wisely. Any near maxed planet that you don't have the resources to effectively cloak put defense on it instead. Many planets don't have to be defended at all because they are easily replaced. I suggest simply maxing the production on anything less than VL/MR+