The GCD (for instant holy fire) and the cast time of Smite at 0% haste are both 1.5 seconds. Haste speeds up all three (ticks, GCD, Smite) equally up to 50% haste (when it stops affecting GCD). While evaluating less than 50% Haste, we can just use ticks instead of seconds. (GCD = 1.5 ticks, Smite = 1.5 ticks).
According to the formula in this article, extra ticks occur at the following breakpoints.
0.0% haste for 7 ticks
7.5/7 = 1.0714 = 7.2% haste for 8 ticks
8.5/7 = 1.2142 = 21.5% haste for 9 ticks
9.5/7 = 1.3571 = 35.8% haste for 10 ticks
10.5/7 = 1.5 = 50.0% haste for 11 ticks
So, Unglyphed Holy Fire breakpoints are:
0.0% haste for 7 ticks and 4 smites
7.2% haste for 8 ticks and 5 smites
21.5% haste for 9 ticks and 6 smites (exactly)
35.8% haste for 10 ticks and 6 smites
50.0% haste for 11 ticks and 7 smites
And Glyphed Holy Fire breakpoints are:
0.0% haste for 7 ticks and 3 smites
7.2% haste for 8 ticks and 4 smites
21.5% haste for 9 ticks and 5 smites (exactly)
35.8% haste for 10 ticks and 5 smites
50.0% haste for 11 ticks and 6 smites
There are multiple types of currency available in World of Warcraft, in addition to gold. Each currency is earned a different way.
Current currencies
This section deals with currencies that are "current" as of the latest expansion - Mists of Pandaria.
Gold
Gold is the primary currency used for buying items from most vendors and from the auction house. Gold is tradable with other players in game through the trade window and can be mailed to other players by using a mailbox. Gold is earned by killing enemies, selling items, etc.
For more information on how to get lots of gold, see How can I earn lots of gold?
PvE points (Justice and Valor)
Player vs Environment points are split into Justice points and Valor points. These points are earned by killing bosses in dungeons, raids, and as a reward for using the dungeon and raid finder. These points can be spent at Justice and Valor vendors for relatively high end PvE gear.
PvP points (Honour and Conquest)
Player vs Player points are split into Honour and Conquest points. These points are earned by killing players in battlegrounds, arenas, and cities belonging to the other faction. These points can be spent at Honour and Conquest vendors for relatively high end PvP gear with resilience on it.
Questing currencies
Darkmoon tokens are earned by taking part in the Darkmoon Faire and can be used to purchase items from Darkmoon Faire vendors.
Lesser charms of good fortune are earned by completing Mists of Pandaria daily questions and used to purchase Elder charms of good fortune.
Elder charms of good fortune are used to "re-roll" on items that drop in Mists of Pandaria raids, to provide you more opportunities to get epic loot from Tier 14 bosses.
Timeless coins are earned from completing quests on Timeless Isle and are used for the purchase of relatively high end epic gear.
Mogu Rune of Fate are purchased using Timeless coins and are used to "re-roll" on items that drop in Mists of Pandaria raids, to provide you more opportunities to get epic loot from Tier 15 bosses.
Notable currencies from past expansions
Tol Barad Commendations area earned by completing daily quests and the Tol Barad PvP map and can be used to purchase a variety of items including low level items for level 85 characters, mounts and pets.
Marks of the World Tree are tokens earned by completing Molton Front daily quests and are used to purchase items and to progress through the Molton Front story line.
Mote of Darkness are tokens earned by killing bosses in the Dragon Soul raid, used for purchasing crystalline geodes (which contain high end Cataclsym gems).
Essence of Corrupted Deathwing are tokens earned by killing Deathwing in the Dragon Soul raid, used for purchasing elementium-coated geodes (which contain high end Cataclysm gems).
Illustrious Jewelcrafter's Token are tokens earned by completing jewelcrafting daily quests in your faction's capital city, used for purchasing Cataclysm jewelcrafting recipes.
Dalaran Jewelcrafter's Token are tokens earned by completing Dalarn jewelcrafting daily quests in Dalan, used for purchasing Wrath of the Lich King jewelcrafting recipes.
Champion's Seal are tokens earned and spent at the Argent Tournament grounds.
Best Answer
Based on my research while other weapons are sentient, Xal'Atath appears to be the only one that references the old gods. However there are some quotes from within the Emerald Nightmare Raid that are relevant
Quotes by Xal'Atath
The only clear cut references were those in the question, but there some others that based on my research appear to be related
Clear references
While in Azuna
At the end of Emerald Nightmare
Tenuous references
While in Val'sharah
Potentially hinting that maybe the Legion isn't our most pressing enemy.
While in Stormheim
Mention of the sleeping city, more on this below.
While in Suramar
Another mention of the sleeping city
Quotes by Il'gynoth
Most of these are not clear cut, don't really stand on their own as a reference, but with further investigation appear to be relevant.
Randomly during encounter
This is talking about the Pillars of Creation and potentially how they would be used to open the prison
This appears to refer to Sylvanas and that she may have something to do with opening the prison
Direct reference to the 'last' old god and to the sleeping city that may be the void version of the Twisting Nether
Referring to someone who may be responsible for opening the prison.
In my research I came across this brilliant post that speculates on a lot of the hidden meaning behind these quotes.
Conclusion: They're coming.