Holy Symbol?

HS has changed slightly such that keeping your bishop in the party will cause the exp to drop due to exp leeched - unlike before where it did not matter. However HS now has 100% effect even when alone - it used to be only +10% when alone. The best solution tends to be make Zak or HT party and move in bishop when HS and buffs are needed and back out to gain the full effects of HS.