0.48

is the current fastest one due to:

always hit bug that is present only on 0.48

it doesn't have level 20 skybird trill fix where horny is tortured so in 0.48 can be easily acquired by accessing the torture chamber room in white dungeon.

It doesn't have level 9 moonbrush change where knight now spawns at random sections unless player triggers action point in the middle of the map.

it has a fire breath bug where hellhound casts firebreath every turn meaning with speed it does double damage per second (from 400 to 800)

Drawbacks:

is missing 1 click build features that save time on levels where a lot of digging / building is required

fire breath has static damage of 4 instead of increasing with level

0.49 - 1.2

Due to fixes fight takes slower on versions 1.0+ (both creature stats as well as map changes)

Firebreath scales with level so 3 dmg till level 5, 4 dmg 6-9 lvl and 5 dmg at level 10.

With the firebreath bug it means it will deal 600/800/1000 damage. Still less damage than horny at level 5 with 4 swings per second but that requires precision clicking 4 times a seconds while fire is just hold left click

1.3+

It fixes the firebreat bug makeing it do correct damage drawing every other frame so 300/400/500 which 2 as less than in previous versions. Possible making it the slowers version to run at.