Invicta led 3-2 after the first period but the attacking duo of Chris Armstrong and Joel Abbott once again led the Sheffield response, scoring five and four goals respectively.
Hat-tricks by Tobias Hook and Stephen Bayles set up Sutton & Cheam's 13-10 victory over Exeter. Sutton were always ahead after building a 5-2 first quarter advantage, although Nicholas Hoversten scored five for the Devon side, including four in the second period.
It turned out to be an outstanding day for London clubs. Polytechnic beat Team Northumbria 11-8, scoring vital goals in the last two and a half minutes through Chris Icely and Jorge Garijo after Northumbria recovered from 7-2 down to trail 9-8.
Penguin also had to withstand a late rally from opponents Bristol before winning the final game 13-11. Bristol, trailing for much of the match, narrowed Penguin's lead to 11-10 in the last quarter before two goals in the space of 30 seconds by Dragos Ungureanu made sure of the points.
Picture (Trevor Hyde): Joel Abbott (white cap) in action for Sheffield.