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SDI vs Eval int

Discussion in 'UHall' started by Dodger, Jun 11, 2009.

  1. Dodger

    Dodger Certifiable
    Stratics Veteran

    Jun 25, 2008
    Likes Received:
    Are they the same? If you have a char with 0 eval int and you get items with maybe 30 SDI does that work out to the same as having 30 eval int?
  2. From UO Guide

    Read the description below, but no they are not the same thing and applied differently. It could be the same if conditions were just right.

    Quote from UO Guide:

    Spell damage increase
    Spell Damage Increase (SDI) is an item property that, surprisingly, increases the damage of most magical attacks that are cast. The property is capped at 15% for PvP. For PvE there is no cap on spell damage, so pack it on.

    There is no formula needed for Spell Damage Increase because it is a true conversion, a 10% increase means your spell damage is increased 10% and so on. The intensity range of the Spell Damage Increase item property is 1% to 12% for found rings and bracelets. The apparent maximum is 30% for special items (e.g., War of Shadows Invasion Spellbooks).

    As with most code over time, Spell Damage Increase is not as straight-forward as it seems. It does affect Poison Strike and Wither, but it does not affect Pain Spike or Holy Light. It appears that it works with Word of Death, as the spell is not dependant on a secondary ability check like Pain Spike, which involves Spirit Speak, or Holy Light, which involves Karma. SDI impact of WoD needs to be confirmed.

    Calculating Spell Damage
    1. A character's skill level of evaluating intelligence is the first thing that comes into play in calculating the base spell damage. The formula for how much spell damage your getting from your Evaluating Intelligence is this: ((evaluating intelligence * 3) / 100) + 1
    2. The next factor involved in spell damage is intelligence. The formula for this is 1% spell damage increase for every 10 points of intelligence, or (intelligence / 10) and drop the decimals.
    3. The next factor is the inscription Skill bonus. This bonus only takes effect when a character has achieved the level of Grandmaster or higher in Inscription. This is a 10% increase in the base damage for Magery Spells.
    4. And finally, factor in any SDI imparted from items.
  3. Harb

    Harb Guest

    Thanks for the repost and thanks to JC for the original info. I didn't know inscription had no effect below GM - doh. I have two characters with 90, had erred in assuming it scaled! Assuming this is the case, anyone know "why?"
  4. It was intentional as an incentive to get you to GM the skill, sort of like the GM damage bonuses for Anatomy and Tactics.
  5. Harb

    Harb Guest

    Understood! Long ago in a galaxy far away when I did spend insane amounts of time watching specifics of everything, it was my understanding that anatomy and tactics did scale all the way upward, with a bonus at 100. I may be "dated" there as well. In this case, there is no scaling, simply a benefit at max skill. Maybe I'm wrong, but if said theme were consistent, you should see some benefit 10-99 and then a small "bonus" at the GM mark. From my view, it kind of makes inscription an all or nothing kind of thing!
  6. I think you are forgetting all the other benefits inscription gives you at less than GM levels.

    Once again quoting from UO Guide:

    A GM Scribe gains a +10% Spell Damage Increase to any Magery spells cast.

    Caster's inscription skill also affects following spells:

    * Protection: Allows you to cast spells without being interrupted.

    Lowers physical resistance 15% - (Inscription/20). At GM inscription, Physical lowers 10%.

    Lowers resist magic skill 35% - (Inscription/20). At GM Inscription, Resist lowers 30%

    Increases spell casting delay. ( Inscription has no effect here )

    * Reactive Armor: Increases Physical Resistance ( +15% + Inscription/20 ) , decreases elemental resistances (-5% each).

    With 0 Inscription (+15 , -5 , -5 , -5 ,-5)

    At GM Inscription (+20 , -5 ,-5 , -5 , -5)

    * Magic Reflection: Decreases Physical Resistance ( -25% + Inscription/20 ), increases elemetal resistances ( +10% each).

    With 0 Inscription (-25 , +10 , +10 , +10 , +10)

    At GM Inscription (-20 , +10 , +10 , +10 , +10)

    It should be noted that the Jack of All Trades for humans works as if they had 20 Inscription skill points.
  7. Setnaffa

    Setnaffa Certifiable
    Stratics Veteran

    Sep 13, 2004
    Likes Received:
  8. Sorry Setnaffa (and Stratics staff). I looked at that before posting information from the "other" source. While the information is complete, it is way too confusing to take in at a whole. It needs a better summary.
  9. Setnaffa

    Setnaffa Certifiable
    Stratics Veteran

    Sep 13, 2004
    Likes Received:
    Really? I thought it was very straight-forward and answered the OP's question entirely, which had nothing to do with Anatomy or Inscription, but whether Eval and SDI are the same or comparable - which they aren't.
  10. Bomb Bloke

    Bomb Bloke Lore Keeper
    Stratics Veteran Stratics Legend

    Apr 26, 2008
    Likes Received:
    That information is neither complete, nor does it answer the question at all!!!

    For every Eval-Int-based damage dealing equation on the page, the equation is as "precise" as:

    This in no way can be used to compare Eval Int to SDI. Heck, it can't even be used to compare Eval Int to Inscription.
  11. WildWobble

    WildWobble Sage
    Stratics Veteran

    May 21, 2008
    Likes Received:
    How to put this the best.

    Eval int vs mage spells vs sdi

    Eval 0 = neg 70 % spell dmg

    Eval 78 = neg 0% spell dmg

    Eval 0 + 50 sdi = neg 20% spell dmg

    Eval 78 + 50 sdi = +50% spell dmg pvm

    120 eval +50 sdi = 88% spell dmg pvm and 53 at cap without scribe pvp. thats 38 for eval no cap and 15 item based capped.

    Eval is sdi for mage spells only where sdi off items affects other spells from other spell books.
  12. Everybody "visualizes" information differently. A chart like Stratics uses is the worst style for me... I'd rather see the numbers and information straight up. It's my math and engineering background, ya know!

    Multiple ways of providing the information is best. There should be a neat summary somewhere on Stratics (for EACH subject). Some are better than others.
  13. Petra Fyde

    Petra Fyde Peerless Chatterbox
    Stratics Veteran Alumni Stratics Legend

    Jan 5, 2001
    Likes Received:
  14. Infiniti

    Infiniti Guest

    *passes Petra a tissue*

    I think you are doing a totally awesome job Petra. :thumbsup:
  15. OH SORRY... I didn't say the table wasn't good, it is very good, just that I don't read tables well. Umm, it's my new glasses. Umm... Ya, they are not good for reading tables. BAD glasses.

    *kicks a blackrock*