They're still not low enough to shift
this transaction (even using
third party broadcast/accelerator sites) after I inadvertently set the fee to 0.00000001 no 0.0000001 - Any help would be appreciated given "Trust" wallets and "Core" wallets don't include unconfirmed TX in new transactions.
Well, it costs 0.005 BTC to accelerate that transaction via Binance and F2Pool, ViaBTC even asked for 0.0077 BTC. By the way, you have enabled RBF, so, what's the problem? Isn't it possible for you to either use RBF or Child Pays For Parent?
I think there is no other hope unless someone pays out of her pocket or someone has an access to some mining pools to manually include your transaction.