Macros, need help

[Grebublin]

Let's take Warden for example.
So i want use item "Unstoppable" before "Last stand" ability.
I buy "Unstoppable" in "V" slot, unbind 4, then type in console:
bind 4 "+in_item4; -in_item4: +in_ability4: -in_ability4"
But if i press 4, i use "Last stand" without using "Unstoppable". If i press 4 again, after "Last stand" have used and it on cd, it use "Unstoppable"...
What i do wrong? How to use item before ability?

[A Pebble]

Press V and then press 4.

[xd]

Or just play normally and stop trying to automate everything like a bot?