[2022] Confused by elemental melee skill itemization

hey guys,

so I've just recently started playing the game a bit and i'm leveling a spellblade focused on flame reave. Then i went on theorycrafting mode a bit and started looking at wiki and tunklab "builder" to see for which weapon i should aim and i found...none if i understood mechanics well?

if i get it right on skills like flame reave or judgement from paladin you get nothing from "increased base spell damage" or adaptive spell damage and the increased melee damage seems lacking since you probably will focus on passives/gear on fire damage instead, so the only fitting weapon would be the iron sceptre but being a level 29 item i guess 1 it starts dropping at a certain lv and 2 its affixes will be always lower tier compared to higher lv items?

Am i missing something? or it's just that being in early access the item pool is limited?