User blog comment:Kogath/Monster Hunter: World Discussion/@comment-184612-20170706151740/@comment-5569775-20170707025137

Level 1 for GS would be 3 * 4.8 which equals 14.4. Base attack of GS was 480, GS + Hunters set(which gives Attack Lv.1, speciffically on the chest) had 494 attack. Level 1 for HBG would be 3 * 1.5 which equals 4.5; base attack for HBG was 150, and with Hunters set it was 155(the rounding up, I mentioned previously). With the Attack Lv.2 on either the full Anja set or Hunters set + Anja Helm the HBG had 159 attack(3 per level equals 6, 6 * 1.5 equals 9).

On a separate note: The Rocksteady Mantle is better than I thought based on the discription " Eliminates damage reactions, prevents wind effects, and protects your hearing.  You also gain gain resistance to tremors while also reducing damage." It has a 90 sec uptime and 240 sec recharge.