if 7 batsman cant cross 150 n 200 in both the innings, it is no use taking seventh batsman n particularly when the same r like useless yuv n dhoni. if 7 batsman can score 150 then six bat wud nt score less than 140(!).
look at the ausi bolrs generating good pace. as v dont hv genuine pacer, v need one of those ishant or pankaj as fifth bolr merely for using their height to generate bounce from the wkt that may trouble ausi. both having ht. of 6 and half ft.