Spirit Shaman 12/Hospitaler 10/Dragon Slayer 4/Hierophant 4, can get the caster level of 31 and BAB of 26. (Spirit Shaman 10, Dragon Slayer 3, Hospitaler 4, Hierophant 3 pre-epic.) Honestly, why settle down for inferior caster level only to get one extra point of BAB? But yeah, I suppose the Spirit Shaman 11/Hostpitaler 10/Dragon Slayer 5/Hierophant 4 gets slightly more perks.
If you just want to use Shapechange every now and then, you could just go for a build such Spirit Shaman 30. You could even grab
Telthor Companion,
Natural Bond, and
Epic Animal Companion and have a spirit wolf fighting alongside you. I do not think it is really worth it if you multiclass heavily. You could even make use of
Blood Magic.
Now, if you want to make a DC based Spirit Shaman you have to deal with the requirement of two ability scores, wisdom for spells, and charisma for spell DCs. Thus a DC Spirit Shaman basically needs to start with 16 in both wisdom and charisma. You can leave wisdom at 16 and just slap +3 wisdom item in order to cast those 9th level spells and then just go for high charisma. It works, but you do suffer from a horrible case of disease known as MAD.
Therefore, I think that the following builds are the best possible DC builds you can have on this server.
Phantom 3/Spirit Shaman 24/Blackguard 3, caster level of 28, Dark Blessing for -2 to enemy saves, and you get both Wisdom and Charisma to your AC. Base wisdom of 16 with +12 from Owl's insight spell gives you +9 AC. Divine Shield from Blackguard with starting charisma of 16 + 7 ability increases and +5 from epic feats gives you another +9 AC. Tortoise Shell spell gives +9 Natural AC, and Halo of Sand gives +4 Deflection AC. Thus in total, you already have AC of 41, without tumble, without armor enchantment, or dodge boots, or ICE, or UMD, or even dexterity modifier factored in.
Spirit Shaman 16/Blackguard 4/Hierophant 10, gets caster of level 32, it can wear heavy armor and shield for AC, and gets that Divine Shield AC on top.
Spirit Shaman 6/Bard 4/Frost Mage 10/Stormsinger 10, both PRCs can progress Spirit Shaman caster level and thus you can reach caster level of 30. You have your selection of ice spell in the druidic list that you can maximise and empower, and the high charisma boosts your Stormsinger song DCs. Storm of Vengeance from Stormsinger songs combined with Burst of Glacial Wrath that ignores cold resistance can work rather well.
Spirit Shaman 23/Warpriest 4/Blackguard 3, caster level of 29, but it does get that combined aura of -3 to enemy saves.
Spirit Shaman 30, you get 3 extra epic feats.
Spirit Shaman 11/Phantom 3/Darkfire Disciple 10/Hierophant 6, can get base caster level of 32. But you need to go Spirit Shaman 11/Phantom 3/Darkfire Disciple 3/Hierophant 3 pre-epic. Darkfire disciple gives you some sneak attack dice, fire damage applied to form, which actually increase your damage output under the Shapechange spell. Phantom gives wisdom to AC, so you do not need to invest in your strength ability score to carry a fullplate, and base wisdom of 16 with Owl's Insight gives you that +9 AC. In a way this would be my preferred DC build with Spirit Shaman.
Now, Spirit Shaman is not a favored class to any race, so that does limit your racial choice if you multiclass into another base class, such as Phantom, Cleric, or Monk. Thus, your choices are basically limited to humans and half-elves, out of which humans are best due to their extra feat at level 1. (Grey Orc Cleric 3/Spirit Shaman X builds work just fine though.)
As for what Spell Focus to choose:
- Conjuration is the best choice with the druidic spell list. Most of your offensive spells are of the Conjuration cchool of spells. For example the ultimate troll slaying spell: Storm of Vengeance. Additionally, it will also increase the HD of your Summons and Elementals. So you get higher DCs, and better summons with Spell Focus Conjuration, it really is the best deal.
- You do have your share of Evocation spells too, so that is an alternative too.
- And if you get Blast Infidel from Hierophant, Necromancy could also be something to consider for those Finger of Death and 300 damage a pop Harm spells.
But the biggest problem with DC based Spirit Shamans is the leveling up process. Your ability score points are spent on both wisdom and charisma, which leaves little to go around elsewhere, and eventually that medium bab progression is just not going to land enough hits without a dedicated AB ability score to support it. You can soldier through, I have, but it is not the most pleasant experience. Things do change the moment you get the Shapechange spell, but the more you have multiclassed, the more you have pushed that spell into the Epics. Hence, what you can do prior to that is just use summons as meatshields while you chip in some damage with a ranged weapon, with or without Zen Archery, or just blasting enemies with some kind of Reserve Feat.
Melee Spirit Shamans can just buff up, and lean towards their strength ability score and damage increasing buff spells. They are the easiest to level up.
But, you can also make a Wisdom based Spirit Shaman because the druidic spell list comes with a list of offensive spells that have no DCs, or it doesn't really matter if the enemy makes the DC or not. In such a case, you can just buff up summons and have them win the day, and with Phantom/Monk dip combined with Zen Archery, your maxed out wisdom gives both AC and ranged AB. The only downside is the limited boosts to your ranged damage, as you only get Bull's Strength for +2 strength modifier and Thorn Skin for 1d4 piercing. Hence you need to use some elemental ammunition and a nice weapon. Or at least consider going for the Darkfire Disciple PRC as it does give you extra sneak attack dice, and that +1d4 fire damage, which also apply if you cast Shapechange.
What a wall of text. I could go on. My favored class. What I am known for. For better or worse.
