I keep hearing people refer to casters being able to get a 60+ DC, but I am having difficulty determining how to get that high. The highest I have been able to calculate is DC55 situationally with Store Potions, Abishai Cookies, and House D Alchemical Potions (for non-Evocation/Conjuration) with a situational, 20 second, +5 boost every 4 minutes.
10 - Base
+9 - Heighten to L9
+3 - Magister School Specialist
+3 - Spell Focus + Greater Spell Focus + Epic Spell Focus
+2 - Greater Spell Focus item
+1 - Lich (obviously I am calculating for Necromancy)
+1 - Wizard PL
+28 - 66 INT (+24 - 58 INT sustainably, +25 - 60 INT for a Drow)
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Total DC57 (DC53 sustainably)(add +1 for Drow)
Intelligence Calculations
18 - Base
+6 - Level-ups
+3 - Enhancements
+8 - Item (apparently a Docent has +8 stats in the new content)
+1 - Exceptional (ToD Ring)
+2 - Wizard Capstone
+2 - Lich Form
+6 - Magister Intelligence I-VI
+1 - Profane from Litany
+4 - Inherent (Tome)
+3 - Insight (apparently some items in the expansion drop Insight bonus types)
+2 - Guild Shrine
+2 - Yugoloth Potion
+2 - Store Potion (situational)
+4 - Profane from Abishai cookies (situational)(does not stack with Litany)
+3 - House D Alchemical (situational)
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Total 66 INT (58 INT sustainably, 50 INT for a Drow)
So, I see a DC53 (DC54 for a Drow) as the most sustainable DC a Necromancy character can reliably maintain. What am I missing that will make casters have a sustainable DC60+ that several people are using as part of their argument for nerfing casters?