Yeah that's the problem with DPS RP/Zealot (and heal spec to a lesser extent) - the trees are an absolute mess. For solo DPS RP you'll want Rune of Fate, Efficient Runecarving, Rune of Burning and Immolating Grasp from middle tree, and Rune of Battle from right tree. Tactics are Divine Fury, Efficient Runecarving, Immolating Grasp and then dealer's choice for the 4th slot. As an alternative you could take the Rune of Nullification heal debuff in the left tree instead of Rune of Battle.
WB-scale focussed DPS RP has suffered two big nerfs - one as a result of BWs being so overtuned, and the other as a result of DPS DoK/WPs being complained about so hard a few months back. This meant that DPS RPs lost their AoE healdebuff and AoE Elemental resistance debuff so they're now pretty much dead for WB-scale play. If you're building a WB with a lot of slayers if might be worth taking a DPS RP for the AoE armour debuff, but it's a very niche setup.