After a reset should my prestige stay constant? I reset at floor 31 and since doing floors 1-5 i've been receiving prestige xp between 1080 and 1086

Prestige isn't 100% set in stone.

 

You have prestige level 31.

But that doesn't mean you get the exact same prestige xp at each floor.

 

However prestige 31 means you do get (much) more prestige xp for lower floors than you would with lower prestige.

Prestige exp varies between floors, getting higher the deeper into Daemonheim you go.

After a reset should my prestige stay constant? I reset at floor 31 and since doing floors 1-5 i've been receiving prestige xp between 1080 and 1086

Certain floors have different prestiges for example you might get 50k from floor 40 which was your max before resetting but you do floor 35 which gives 42k then it averages those together to give you the prestige you earned for that particular floor then it multiplies that by your efficiency %. So you would a 46k prestige average and then it would multiply that by your average example 140% to equal your total xp gained.

After a reset should my prestige stay constant? I reset at floor 31 and since doing floors 1-5 i've been receiving prestige xp between 1080 and 1086

Certain floors have different prestiges for example you might get 50k from floor 40 which was your max before resetting but you do floor 35 which gives 42k then it averages those together to give you the prestige you earned for that particular floor then it multiplies that by your efficiency %. So you would a 46k prestige average and then it would multiply that by your average example 140% to equal your total xp gained.

The base prestige is constant.. it is "level 30 prestige". However the actual prestige you see CAN change over various floors: the base is modified by for example the amount of rooms in your dungeon, the average level of npcs met..

After a reset should my prestige stay constant? I reset at floor 31 and since doing floors 1-5 i've been receiving prestige xp between 1080 and 1086

Certain floors have different prestiges for example you might get 50k from floor 40 which was your max before resetting but you do floor 35 which gives 42k then it averages those together to give you the prestige you earned for that particular floor then it multiplies that by your efficiency %. So you would a 46k prestige average and then it would multiply that by your average example 140% to equal your total xp gained.

The base prestige is constant.. it is "level 30 prestige". However the actual prestige you see CAN change over various floors: the base is modified by for example the amount of rooms in your dungeon, the average level of npcs met..

 

So basically:

Read what I posted further up that covers it without getting all complicated and technical as to HOW it changes and thereby confusing matters slightly.