Simple question, Yaulp 2, worth using? How? Why, why not?

[Mortifer]

So I just hit 19 and can buy Yahlo 2. I had Yaulp and used a it early levels 1-4 or whatever but didn't see much point.

I'm soloing ghouls and other undead and at times mana gets close cause Inam not a twink, this is my main. So since at this level I still melee a fair about if I can't root would it be worth using Yaulp 2?

And if so how do you use it properly? Just keep it up any time you are metering right?

I know it's probably a simple question but I can't afford to waste plat if the spell won't make enough difference to help me farm better with added melee damage. Also I don't have a decent cleric weapon so I'm not doing tons with it, I think my max meter hit is for 14-16.

Thanks all for any answers!