25 from scrapper
15 from crystal wizard glasses (10 only from HoM, but resists and MR is better)
5 from pendant
20 from crystalline ring
12 from bracelet
10 from midnight bracers
10 from spell woven britches
= 97
With free slots for aof + stitchers for 100% lrc
If you swap those out for 2 pieces of the greymist(?) set, each will give you a +2. That'll bring it to 101, but youo have to bring regs.
For even more, +arcane empowerment, +reaper form. Can't remember how much those 2 adds.
Arcane empower gives 10% per focus lvl, so up to 60%. It's a very powerful spell and imo one of the critical spells to learning how to play an arcanist well. A lot of arcanists just use spellweaving for WoD, but the good ones all use arcane empower
I think reaper form gives you 20% SDI + 1% per focus lvl, but I'm not sure. I rarely use reaper form, because I don't like sacrificing mobility for the SDI buff.
I'm pretty sure SDI has diminishing returns, though. There was a patch maybe 6 months ago that before the patch I could 2 hit kill demons (demon slayer scrappers) and after the patch it takes me 3 or 4 spells.
Going nuts on SDI has its advantages, but diminishing returns definitely encourages you to build a balanced suit.
Also of note, GM inscription gives you 10% SDI that doesn't count toward your 15% pvp SDI cap for spells that use eval to calculate their damage.