It used to be that the Oline where mostly on strongly tweaked TTCs, however the strong Proline rookies have kind of taken over as the kings of strong. With the TTCs you definately needed more rear weighted figures or they would tip forward. The best stock figure for this is the hati repros where the blocker figures are extremely well balanced for TTCs and work excellent on the line. The 67 big men blocker figures are shifted more foreward on the platform and unless you reposition them back more, they can tip foreward too frequently on TTCs. However the Prolines are such great balanced bases with the prongs in the extreme corners that the 67 figures work pretty well with them. As far as the buzzbal figures go, the foreward arms are the most significant aspect to these. I would think they would work well in front of base tackling because they can grab a defender when it is going by and spin the defender around. In front of base this kind of "block" is good because it can get the defender "out of position" to make a tackle. However in any touch since the side of the base can make a tackle then spinning the defender around actually can leave the defender in better position to make a tackle against a run. I have always been concerned that a power line with arms foreward figures might actually turn sideways and "make the tackle" on my own RB too
I like the idea of having two offensive lines or at least several backups that have diffenent strengths. For example you may have a starting 5 with power pro lines, a backup left tackle on an ITZ, and maybe some backup lineman on TTCs in case the defense plays a 3-4 and you want better directional control of your lineman to arc into the second level of the defense to seal off a play.