Which Xenon Special Mastery Book to choose?

OOPArts depends on how fast you recharge your supply, and how well you can juggle Hologram. You DO know that you can open one hologram immediately after another has expired and on cooldown? Very useful at low levels - but opening one hologram when another is out will remove that existing one. Tests your ability to switch modes within one Mecha Purge - Snipe delay.

Hadriel