OK here is a FULL SOLO HD Achievementguide. All Perks in Round 6! Not 8, not 9, no 12 or higher, round 6!
I think with many Luck (No Bomb, 2x Multi) it is possible in Round 5 but Round 6 its ok :)
If you have a Question, aks me ;)
Its easy and simpel, follow the Steps in the Video. Have Fun!