The first thing you have to note, is that Lucy lists everything with the same slot number and description (or ID number called an SPA actually). However, you only have to worry about actual buffs, or spell effects that go into either the long duration or short duration (song) buff windows. Lucy will show worn effects, as it does not know if the effect is worn, casted or what without looking at where it came from (item, spell scroll, etc.).
You will have to look into the individual effects and determine whether they are cased or worn. Generally the info is very good, but how since spell foci are dependant on multiple slots, sticking is more of an issue. If you can get multiple potions of different focus types (magic in the case linked, and say a poison in another case, but also a mana preservation type), then they won't really be stacking, but can coexist and operate on the different but appropriate type spells, just as worn foci do. In other words, since if there was a case where a spell was both magic and poison, you'd only get the best effect, but since there are no such spells, a magic spell will get the mana preservation of the linked potion, while a poison spell will get the preservation of the poison one, if they both stick.
Sticking means that you get the buff of both effects. I'm not sure about spell foci, but in general, any slot with the exact same trait (ID number / description) will not stack on buffs. By this logic, all of the effects listed will not stick either. However, I believe the limit type effects are ignored, as far as sticking, so the only one of importance on the stacking is the slot 1, mana preservation. I don't have any evidence of this, just seems to make sense, and is how you would think it would of been implemented.
As an example:
http://lucy.allakhazam.com/spell.html?id=11397&source=Live Chromatic Awareness VIII is only found on
https://everquest.allakhazam.com/db/item.html?item=83775 Tonic of Chromatic Affinity VII potions, and there won't stick or stack, since they are both buffs. But if they did stick, then they wouldn't really stack but would work on their respective type of spells, just how they do in worn cases of similar effects.
Basically the Lucy link, is actually for sticking conflicts, as it doesn't care whether the effect type is cumulative or not. Spell foci are not cumulative. If this statement doesn't make sense, then refer to the wiki page on reading
Spell Data as it explains the overall concepts of sticking, stacking, and cumulative and non-cumulative effects.
Yther Ore.
Edited, Nov 16th 2014 6:49pm by Yther