There have been some awesome points made in this thread already.
So I was very bored and I used my project management software to map out making a mythic from nothing and this was the result:
Base line Mythic building is currently 175 Days:
Every Day Events
101 days for assaults – 51 for the initial runs plus one Nyzul mission run for Captain & 50 for doing them again for the second quest.
74 days for running Nyzul Isle for Token & 1~100 climb if not previously done.
Note that Nyzul also takes Imperial tags, so you cannot do this at the same time as assault missions.
The two parts above are the limiting factor for your Mythic Weapon 175 days sense the regen time of imperial tags is one per day.
Salvage – the minimum you have to run salvage is four times, once in each remnant for the win, but it is suggested you run it daily to gather alexandrite
Einherjar – EVERY DAY, okay only 53 days, if one has not gotten an Odin v1 win the first 10 days will be gathering each wing feather and then killing Odin on the 10th the other 43 days will be spamming tier 3 wing for 1920 Ichor a day making the 100,000 you need in roughly 43 days. If Odin has already been defeated it is very simple take the ichor you have subtract it from 100,000 then divide by 1920 and round up to the nearest whole number. Boom! That is how many days you must run Einherjar.
Note that lamps for Einherjar cost 60,000 gil (3.18 million gil if you do not split it out) and there MUST be SIX Player Characters on the field at all times or the event will end.
When you have time:
Kill the thee Beastman Horde Leaders (NOT in besieged ie in their normal zone). Each leader required 3 keys to reach, in addition to the troll requires six players to open the gate via switches. They are almost always up now as SE has changed their respawns to be quicker.
ZNM Items – Farm zeni. Once you have let’s say 45,000 zeni, you can start making your pop sets. Fin the easiest/most convenient Tier 1 and Tier 2 ZNM in a path to fight. Kill them and get your first Tier 3, kill them again get second Tier 3, and kill them a third time and your 3rd tier 3. Kill the 3 tier 3s and then get your tier 4 pop item kill the Tier 4 (Tyger, Sarameya, Tinnin) and repeat the process for the remaining, until you have their item. Caution! DO NOT turn them in for the KI from the ZNM guy, the quest is for the items themselves!
Alexandrite –
The most expensive part of the quest, I checked FFXIAH.com and it seems the average cost is about 11,000 gil per piece. So depending on the server played the cost of this stage varies. So at 11k a pop the 30,000 alexandrite will cost a whopping 330,000,000 gil. So between buying and gathering there are some options.
Option 1 – Farm Dynamis every day hopefully netting 400 coins per run, and selling the coins at an overall average of 7500 gil ea (that is the average on most servers it seems) it would take about 128 days to buy your alex. That is still less than the overall time for assaults hint hint.
Option 2 – farm only Salvage and buy nothing. Salvage is a daily event so if you are able to net say 100 alex from salvage you would be looking at 300 days of just salvage. This is not recommended! We are looking at doubling the time it takes to make the weapon.
Option 3 – A mix of the two first options this would reduce the time taken to 85ish days.
Option 4 – Mix and match! This is the best option, run dyna, run salvage, use other funds but do what you need to do to not BURN OUT that is the biggest thing with mythic builders is that they grind so hard they almost always take a long break shortly after the mythic is done. Take it easy! Relax, and enjoy the game! As long as you do assaults before you max out on tags you have 175 days to do it.
It has already been mentions what could be done to make this process simpler:
More ways/Greater amount of Ichor
Change in Imperial Tag system
30k Alex is not that bad, but maybe having more of it drop from salvages would be nice.
Removing the 6 person requirement from Einherjar .. PLEASE PLEASE PLEASE do this, Last night we got people together and someone decided they didn't want to split the cost last second and left us and we nearly lost our reservation. If there must be minimum amount of players greater then 1 I would suggest 2-3. But 1 would be optimal.
This really just says again what has been said before. I am currently working on my first mythic, I'll be done as soon as I have my ichor and tokens.
One part of the quest that never made sense to me and really just seemed to be there to push time was redoing all 50 assaults. I think it would kind of be fun to get the journals with some of the assaults randomly done, so that you had to do lets say 25 random assaults.vice all 50 ... doubt that could be done, but if you are captian's rank you had to do all 50 assaults, so having to "prove" you did all 50 should be as easy as showing that rat my shiney rank badge.