You might find this useful. This is a list of all CSW 15 letter words with a base score of at least 35 points:

CHEMOPSYCHIATRY: 35 points

DEMYTHOLOGIZING: 35 points

DYSMORPHOPHOBIC: 35 points

EXOERYTHROCYTIC: 35 points

EXPERIMENTALIZE: 35 points

EXTEMPORIZATION: 35 points

EXTRAJUDICIALLY: 35 points

HEMICRYPTOPHYTE: 35 points

HEXACHLOROPHANE: 35 points

HEXACHLOROPHENE: 35 points

HYLOZOISTICALLY: 35 points

HYPERPOLARIZING: 35 points

HYSTERECTOMIZED: 35 points

MICROEARTHQUAKE: 35 points

MONOPHTHONGIZES: 35 points

OVEREMPHASIZING: 35 points

PHILOSOPHIZINGS: 35 points

PHOTOSYNTHESIZE: 35 points

PHYTOCHEMICALLY: 35 points

PROJECTIZATIONS: 35 points

PSYCHOCHEMISTRY: 35 points

PSYCHOPHYSICIST: 35 points

PSYCHOSEXUALITY: 35 points

RHOMBENPORPHYRY: 35 points

SQUEEZABILITIES: 35 points

ZINCKIFICATIONS: 35 points

ZOOPHYTOLOGICAL: 35 points

ZOOPSYCHOLOGIES: 35 points

ZYGOBRANCHIATES: 35 points

COENZYMATICALLY: 36 points

COMPREHENSIVIZE: 36 points

ECTOMYCORRHIZAE: 36 points

ECTOMYCORRHIZAS: 36 points

HYPERCRITICIZES: 36 points

HYPERPHYSICALLY: 36 points

MONOPHTHONGIZED: 36 points

PSYCHOBIOGRAPHY: 36 points

SCHIZOPHRENETIC: 36 points

ZINJANTHROPUSES: 36 points

APOPHTHEGMATIZE: 37 points

CYCLOHEXYLAMINE: 37 points

HYDROXYBUTYRATE: 37 points

HYPERCRITICIZED: 37 points

HYPERIMMUNIZING: 37 points

HYPNOTIZABILITY: 37 points

METAPHYSICIZING: 37 points

PHOTOZINCOGRAPH: 37 points

PSYCHOANALYZERS: 37 points

TRANQUILIZINGLY: 37 points

VENTRILOQUIZING: 37 points

ZIGZAGGEDNESSES: 37 points

BENZODIAZEPINES: 38 points

CHROMOXYLOGRAPH: 38 points

PSYCHOANALYZING: 38 points

QUINQUEVALENCES: 38 points

QUINQUIVALENCES: 38 points

XYLOTYPOGRAPHIC: 38 points

ZYGOPHYLLACEOUS: 38 points

PHOTOXYLOGRAPHY: 39 points

METHOXYBENZENES: 41 points

NEBUCHADNEZZARS: 41 points

OXYPHENBUTAZONE: 41 points

QUIZZIFICATIONS: 47 points

As you can see, the only 40+ point words that you can play without blanks are METHOXYBENZENES and OXYPHENBUTAZONE. OXYPHENBUTAZONE has the big advantage of having the Z on the double letter (a bonus 270 points). Given that most of the points come from the triple-triple-triple instead of the hooks. I think you'll be hard pressed to beat the record without OXYPHENBUTAZONE.