Depends on the level of Haki and the DF. If my Haki is mediocre or even well but still not remotely at the top, if I got my hands on a legit top tier fruit, arguably logia, sure, why not.
If my Haki is in the Yonko/PK realm, I'd prefer honing my natural abilities and skills. DF users are weak not only to the sea but different weapons, like Kairoseki, which can come in the form of handcuffs, bullets, nails, and we have seen how Vegapunk created guns utilizing bubbles that emulate the power of the sea.
Imagine a dfless Yonko level character carrying Kaidoseki nails in his pocket.