It doesnt show up on character stat sheet, which w/e, but it isnt even applied to anything. To test this, im Ball lightning build, have the stacking 3% crit chance in addition to using elixir of precision for a resting crit of 47.2%.
Have two focuses (foci?), same intelligence. Focus 1 has 55% damage affix and 52% damage temper, focus 2 has 37% damage affix and 120% shock crit strike damage.
Knowing how additive damage works, focus 1 should give 107% additive damage, focus 2 157% additive damage. Keeping the conditions the same on each go on boss testing dummy (enchantments still active for burn + vuln uptime), i noted that focus 1 gave faster kills (complete wipe pit of health on dummy) faster than focus 2 (which should not be the case if focus 2s additive damage is being properly accounted for).
Thats the second problem that exists for lightning spec. Please, fix this + enhanced ball lightning. Season ends in 2 weeks and this build still cant live up to its potential because you insist on keeping it in a gimp suit.
Edit: i did compile numbers for anyone thinking kill times are a bad way to measure, focus 1 gave higher crit numbers on average (164k to 198k) than focus 2 (135k to 154k)