The tactical feat Stormguard Warrior (ToB 36) grants the use of the tactical maneuver Combat Rhythm, which says
To use this option, you can choose to make melee touch attacks in place of normal melee attacks against an opponent. These touch attacks deal no damage. For each melee touch attack that hits, you gain a +5 bonus on melee damage rolls against that same foe on your next turn.
While employing the tactical maneuver Combat Rhythm, must a creature make all of its melee attacks as touch attacks, or can a creature mix normal melee attacks and these melee touch attacks?
Discussions of the feat Stormguard Warrior usually focus on the tactical maneuver Channel the Storm with only a few mentioning the tactical maneuver Combat Rhythm. When the latter does come up, opinions seem divided, but then discussion turns back to the former because it's much more easily exploited (e.g. 2007, 2013, 2011, 2014—this last interesting but unresolved).
For an upcoming official-only-but-then-the-kitchen-sink campaign in which PCs are limited to Tier 3–4 base classes (and prestige classes that don't rocket PCs up the chart), I'm trying to mitigate my bad luck while still playing the party's lone melee combatant. I'm picking volume over accuracy and power, playing a totemist and looking to exploit the totemist's potentially massive number of natural attacks. Used normally, many of the character's natural attacks won't hit or will hit for tiny amounts of damage. However, if the tactical maneuver Combat Rhythm permits mixing normal and touch attacks, the feat Stormguard Warrior remains worthwhile for my character, allowing him to strike hard at least once this round then trade never-hitting iterative attacks and low-damage secondary attacks for cumulative +5 bonuses on damage rolls next round. A trade for volume and power over accuracy is much more palatable.