For something less squiggly, I'd also suggest carrying some black obsidian with you. It has very strongly protective energies.
You
might not want to try it if the problematic entities are shadowy, though. If they are shadowy, lovebombing can be effective.
In other words, in a normal battle of wills, the nasty beats at you and you try to protect yourself, or you try to fight back. The stronger wins, and your situation doesn't seem like that would be you. With a little lovebomb though, when the nasty entity is all "ARGH I KILL YOU!!!" (translated to English from the energetic feeling, of course) a response of "I love you! You're so pretty! Stay still while I give you a big wet kiss!! <!-- s

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--> " can get the bad guys to go "Huh? Wtf? I don't like this dude and I'm leaving!"
All very general advice of course, and I make no suggestion that it would work for every situation.
Edit to add: if they're brighty lighty bad guy types, the symbolic power of India ink can't be overstated. It's verrrrry black and it blackens anything it touches.
Hmmmm. While I myself have general "always on" shielding and stuff, it seems like you might need something more unusual to bolster your more straightforward defences; asymmetric warfare, spiritual style. For me that would involve needing to know a bit about the enemy's core nature and how I personally interpreted their symbols. Happy to share specific ideas in this thread or PM if required.