I won the Pioneer Challenge with stock G/W company! It was very kind to me today. 
Matchups: 
R1 Niv to light WW 
R2 Boros convoke WLL 
R3 Grixis Valgavoth WW 
R4 RakMid WW
R5 Scooped in by Elle
T8:
UW spirits WW
Rakmid LWW
Niv to light (r1 opp) LWW (we split prizes)
@fireshoes