TERA Tower of Rubble Achievement

100 of each of the following are needed to complete this achievement. It's tedious especially considering it's only worth 30 achievement points. Be sure to change channels often to help eliminate respawn time. 1. Jurnagg Portals - directly South of Shadowspark Chamber 2. Aquaas Extractors - lower Southeast area from Shadowspark Chamber (2 in each of the 4 round rooms) 3. Grellok Spires - 2nd round room South of Mindcrown Chamber