Rogue Quests

[Snak3y3]

I have a problem with the rogue quests.
i need to hit 3 baddies with one attack, but it seems i cant do it, cause it isnt progressing. do i have to use the "charged"normal attack, or the "combo" normal attack where i hit the normal attack three times in a row?
and the backstab quest isnt working either, do i have to be insivsible MORE than 1 sec and then do backstab or EXACTLY 1 sec?
Pls help, i need to get to the Necromancer unlocked.....

[Gonna_Fly]

for the backstab, hold the button to use the ability, run behind a monster then release the button to stab.
for the 3 monsters find a group then tap the attack to throw multiple daggers at the same time so it's the combo.

[Torus]

For the 3 monsters in a group, you can also do 2 normal attacks, then charge the 3rd attack in the combo. That way you get 5 piercing daggers on the 3rd attack, which makes it a lot easier to hit 3 enemies at once.