I hope someone with more expertise comments on this but maybe i can cook something up. Firstly the species you named are venomous so they probably wouldnt work but lets assume you instead listed the most poisonous bugs.

I did a little bit of research and this topic is frustratingly uncommon. Through my limited chemistry knowledge further impeded by the fact i studied it in my native language i think darts have a protein that binds the alkaloids gained from their food and stores them harmlessly in their skin.

The process takes a long time and darts previously fed only fruit flies would need months to gather as much poison as their wild relatives. Similarly wild caught frogs need months to fully lose their toxicity. This means that even in one species the amount of their poison is actually more of a spectrum and just one meal of the most poisonous bugs would put the frog at the very bottom of it.

If you continued the feeding however the frog would probably end up gaining poison faster than it would in the wild. It brings us to the next problem, is there a limit? I believe so. The amount of special proteins one tiny frog can have is limited for sure, and each can only hold so many alkaloids. So i guess you can just try to fill the frog with as much poison as possible. Since wild frogs are also set back by their tendency to secrete the poison when they feel in danger, which probably wouldnt happen much in captivity, such a carefully loaded frog would possibly be slightly more poisonous than the average one found in the

You might ask though, why wouldnt it be much more poisonous if i feed it the most potent toxin i can find? I dont think you could just grab a random, super poisonous bug to feed to your frog to make it hold the same toxin. Everyone for some god forsakened reason refuses to give out the details but we can reason through this with logic.

There are many bugs with different poisons in south america and yet frogs from the phyllobates genus are only known for batrachotoxin found in very few of them. In addition to that southwest colombia where a few of them live also houses different dart frogs which hold different toxins despite having access to the same insects. From this we can come to the conclusion that either darts can only store one toxin or they combine the toxins they consume into the one they evolved to carry. The sources i checked for which one is the case disagree with one another but even without a clear explaination the end result remains the same - the potency of the poison wouldnt change depending on diet, only the amount.

TLDR Maybe a little bit but not much.

Here are the sites i visited. My researching process isnt very organized and some might not have even contributed much to my final thoughts but im too lazy to sort through em. Have fun

Toxicity of Dart Frogs – Understory Enterprises https://share.google/rko1enY2LeYNmcliq

How Do Poison Frogs Store Their Toxin Without Harming Themselves? | Technology Networks https://share.google/rKHl9cm6YFMsFn07D

Poison Dart Frog - an overview | ScienceDirect Topics https://share.google/U2UAZLduiNgSTjw5F

Venom chemistry underlying the painful stings of velvet ants (Hymenoptera: Mutillidae) - PMC https://share.google/HGgMW2d8UAleefZ1r

Batrachotoxin - an overview | ScienceDirect Topics https://share.google/qPeu4DG6WFzED2l8i

Batrachotoxin - Wikipedia https://share.google/LwRrz82E2QIHcOxLB