Result of the Growth Drive by tier and in total (Patreon)

For the tier 60 ( 120 kg) ; 1 votes for Tsunade ,1 for Erza

For the tier 15 ( 30 kg ): 2 votes for Erza

For the tier 10 ( 20 kg ); 7 votes for Raven, 6 votes for Tsunade, 3 vote for Erza

For the tier 8 ( 16 kg ): 1 vote for Raven, 4 votes for Tsunade, 1 vote for Erza

For the tier 5 ( 10 kg ); 3 vote for Raven, 7 vote for Tsunade , 4 for Erza

Total for Tsunade 434 kg Wow 

Total for Erza 236 kg She will need to change her wardrobe ( and her armor/weapon )

Total for Raven 186 kg Not far from Erza