If you see my earlier post at a minimum a boosted A-bomb.
It's been awhile since I studied this stuff, but my recollection is that we were getting yields in this range with very little contribution from Fusion. Most of the energy came from improvements in the Fission process, such as thicker tamper and such.
I don't think just adding Lithiumhydroxide to the mix does anything useful. Our initial designs of Fussion bombs required fission material sufficient for two A-bombs to get it to work at all.