GW2 | So Life Like Achievements | Dragon's Bash
One simple method of doing this is from inside the Dragon's Bash arena in Hoelbrak. Just kill the holographic minions until you get the number you need for the achievements. Both the normal "So Life Like" and the "(Annual) So Life Like" work with this method. (i believe killing holographic mobs during the stampede events in other maps also count for this achievement.)