sup white martel 11%ed/3Ar/50%dmg undead 67-109 dmg iso offers

doesnt affect imbue.

when you do imbue on Diablo 2, dont matter if item is SUPERIOR or CRACKED, in the moment you imbue, it return to natural standart base.
so irrelevant for us a superior item to imbue

what some guides says is the iLVL ( item level )

so you have more chances to get a good imbue when you using a LVL AREA 78 items, from Chaos Sanctuary Hell, not even from River of Flame which is level area 77. here link to check classic lvl area => https://forums.d2jsp.org/topic.php?t=17219980