There is but it requires a certain level of grinding. Once the required grind is done, you'll be able to play some of the most fun build in the game as it lets you combo chain between different types of skill. You'll find a number of unexpectedly fun synergies that you wouldn't be able to find from a mono build.
A hybrid build where you want Lona to be a jack-of-all-trades means not selecting any of the 'Tough', 'Timid' and 'Nymphomaniac' personalities. A Lona with a 'Normal' personality can wield and learn almost anything the game has to offer, but with the downside of being a lot squishier (not getting the additional DEF increase from the personality trait for example) and requiring more grind for some of the sub-build, namely Magic and Succubus. Physical nearly need no grind to be functional (just unlock 'Bloodlust' and 'Weapon Expert' along with some of the high quality weapons) so this sub-build is what will carry most of your early plays until you get Magic and Succubus to a more functional level.
Here's some details on how you can grind Magic and Succubus: