Для начала, прочитать его правильно. Поскольку это одна классофича, то попытки вставить действие фита посреди неё несколько не прокатывают. Так что там max(+0, +1d6-3) в результате, а не +1d6.
ФАК от 30.06.08.:
Does the bonus to caster level from the Practiced
Spellcaster feat (from CAr and CD) apply before or after
other caster level bonuses (such as those from the Good or
Healing domains)?The bonus from Practiced Spellcaster applies whenever it
would be most beneficial to the caster. A 4th-level cleric/4thlevel
fighter with the Healing domain and Practiced Spellcaster
would cast Conjuration (Healing) spells as a 9th-level caster
(base caster level 4th, +4 from Practiced Spellcaster, +1 from
the Healing domain). A 4th-level cleric/4th-level rogue with
Practiced Spellcaster who activates a bead of karma (from a
strand of prayer beads) would cast her spells as a 12th-level
caster (base 4, +4 from Practiced Spellcaster, +4 from bead of
karma).
How does Practiced Spellcaster interact with the wild
magic class feature of the wild mage (from CAr)?The –3 penalty and +1d6 bonus to the wild mage’s caster
level are applied as a single step in the process of determining
the wild mage’s caster level. Since Practiced Spellcaster’s
bonus is always applied when it is most beneficial to the
character (see previous answer), a wild mage with Practiced
Spellcaster would typically apply the wild magic class feature
first (subtracting 3 and adding 1d6 to her caster level) and then
add the Practiced Spellcaster benefit, up to a maximum value
equal to her character level.
For example, if a 5th-level wizard/4th-level wild mage with
Practiced Spellcaster rolled a 1 on the 1d6 bonus to her caster
level, her caster level for that spell would be 9th (base 9th, –3
from wild magic penalty, +1 from wild magic bonus, +4 from
Practiced Spellcaster up to a maximum equal to her character
level). If she rolled a 6, her caster level would be 12th (base
9th, –3 from wild magic penalty, +6 from wild magic bonus;
the Practiced Spellcaster bonus would not apply since it would
increase her caster level above her character level).
On the other hand, imagine a wild mage whose caster level
(before applying the effects of the wild magic class feature) is
less than her character level, such as a wild mage with levels of
rogue or other non-spellcasting class. She might well choose to
apply the Practiced Spellcaster bonus first, before applying the
wild magic modifiers. A rogue 4/wizard 5/wild mage 4 would
have a base caster level of 9th before any other modifiers are
applied. Adding Practiced Spellcaster’s bonus would increase
this to 13th, at which point the penalty and bonus from wild
magic would be applied. The Sage recommends that players
averse to frequently recalculating caster level avoid playing a
character with this combination, as it is likely to cause
headaches.
Тут ответ Деста и ФАКа расходятся.