make Enrage to be worth skill

hello,

I suggest to make Enrage to be worth having skill for heros.

the main comparation i can make is like Concentrate skill of BM because basically Enrage and Concentrate are similar designed.

nowdays : Enrage is not being active (unless its lv20) with rage.
future suggestion : Enrage will be active in any level with rage (may consider change the attack boost of it)

Correction edit:
I was asked to do a correction edit because i may be sound greedy on the weapon attack boost im asking for.
so what i meant in first place was having Enrage stack with ATT pot at once but get Enrage buff less weapon attack
so lets say Rage gives +20weapon attack so like Enrage will buff +10 weapon attack (with same cooldown of 8mins)
but the main point is having attack pot + Enrage stack
hope its well understood now
thank you!
magen.