Well Minato was creating Jutsu's like Rasengan, although incomplete I bet it would crush through the wood shield and the 1st would crap himself like Madara did when Kabuto summoned that last coffin. Plus it was never said to what extent Minato could use the Rasengan, being its creator I'm sure that he could make massive ones... and so far Pein was the only one so far to be able to block it (forget which body, but the one who absorbed it) so FTG and Rasengan beat wood style IMO!