Early vs. late center (Emerald)

EARLY CENTER:
0.3 movement to center
12.5 use center
0.6 mud shot ralts
8.0 get+use elixer
0.8 shroomish troll
2.0 buy super potion
3.9 use super potion
0.2 to fewer healing items

LATE CENTER:
??? to wattson
17.5 use center
1.4 to lower hp entering flannery

If Wattson cost is less than 9.4 seconds, late center is better