Just a little note:
Revised sam spreadsheet, uploaded new version.
Uses new, clean format layout. Includes Meditate (and Meditate merits), Zanshin/Hasso-Zanshin/Ikishoten (properly calculated now), Zanshin merits, Overwhelm merits, and general cleanup.
Meditate is assumed to give a simple 1.5 weaponskills per time gap. The value 1.5 is used on the assumption that Sekkanoki will tend to increase efficiency, so you'll tend to get close to the full benefit of Meditate (~150 TP on average with AF head and relic hands). There's also an over-time value that you can specify, to indicate how much time past the recast timer your average use of Meditate is.
Let me know if you find any issues.