You are not hitting wall, TU4 axe is very good, you can beat everything with it. Just some bosses will take logner, but you will not notice that big of a difference after crafting axe. People seem to think this changes build, you just gain some damage, but it is far from even 50% increase, if you consider all sources of damage this build has.
What I would do is throw all shrines on that labrys, until i get good enhanced damage + max damage roll.
If you get good max damage and low %enhanced damage, bless with weird shrine hoping you can "fix" it, because that shrine can add bit ED. Also lucky oil it for more. Then MO it to get as close to 200ed as possibe.
In case of good craft that already has high ed roll, you don't need to do that.
Then bless with something else, creepy for strength, intimidating for deadly strike, there is bunch of options.
MO according to preference, can get life leech, can get more attack rating, can get bit of deadly strike, max damage, there is many options and difference between them isn't big. Mana on attack isn't horrible option either in some cases.