Using multiple files as key file is overkill and i doubt anyone will successfully crack it (at least not in distant future or very big cost). I expect most KeePassXC user only use password or/and single key file with default encryption configuration.
The purpose of the keyfile is to 'simulate' what I hope a large security company would do when storing my data. ie: they would have a 'vault' of some sort with a 'masterk key' that all of their encrypted dat for users is stored in above and beyond my storage itself.
Hindsight being 20/20 nw I should have used the keyfile on the truecrypt container, to better simulate the idea, but oh well.