https://twitter.com/auw1975/status/1050394042867965952

This Tweet seems to explain in detail how the new wand works

Tech Explosion Enhancement Mode
- Tech Explosion Power +5~20% (40 Seconds)
- Enters Stage 3 (Max Power) after 8 Technic Hits (Either Technic or Tech Explosions, I can't quite make that out yet)

Technic Enhancement Mode
- Tech Power +2~20% (20 Seconds)
- Tech Explosion buff reset

Tech Explosion Damage
1 Orb - Stage 1 (10%) requires 1~2 hits
2 Orbs - Stage 2 (15%) requires 3~7 hits
3 Orbs - Stage 3 (20%) requires 8+ hits

Tech Damage increase depends on the Stage of previous Tech Explosion Stage
Stage 1 - 5%
Stage 2 - 10%
Stage 3 - 20%

There is no Striking Damage multiplier