Guide for Emblem Upgrade and Cost by EMP

(This guide is brought to you by EMP)
To keep the guide concise, I will not be elaborating on what are the benefits of equipping Holy Emblems and how much power will emblem provides you. In summary, emblem is a crucial feature to upgrade your Units above leveling, talent potions, Hero and Artifacts boost.
=Emblem Tiers=
Tier 	Description 	Recommendation
Green 	This is the lowest tier of emblem and the stats value is very low. It cannot be further upgraded making this tier not worth trading your resources for. You can obtain these emblems for free through participating in the twice weekly Endless Inferno PVE event.	Dismantle them for extra souls unless you need them to form a set before replacing them with a higher-tier emblem.
Blue 	This is the second lowest tier of emblem compared to green. You should replace your green emblems with these asap when you can. Recommended for starter players not intending to spend too much resources when you have to upgrade other features. They
can be obtainable free in Endless Inferno PVE event.	You can keep them but not recommended to upgrade them, dismantle only if you have resources to have purple/orange emblems. In this guide, I will use the blue emblem as the base value for comparison. To simplify, I will use X as the base power.
Purple	This is the second most powerful tier at the moment before orange. You will keep these emblems for use and to form a set suitable for your units. You can get these from emblem store and once in a while from chest from the Endless Inferno PVE event. 	The power of purple tier emblem is roughly about 1.6X in terms of stats value and also you would have noticed that the bonus
in the set differ by a range of 1.5-2X depending on the bonus it provides. Certain bonus has a value far greater than stats – example for one emblem the difference between an orange and purple is the increase in 1 skill level of units. Purple emblems can be upgraded up to level 5 and it is comparable to a certain level of orange emblem.
Orange	This is the highest tier at the moment and the bonus provided in this tier is much higher than the rest giving a power value of 3.3X which is twice the power over a purple emblem. Also, the set bonus is as mentioned 1.5-2X higher than purple. 	This is the end game tier emblem and can be upgrade to +10 eventually. You can obtain this tier through the Emblem Store or
the Lucky Snatch event that happens periodically.
=Maxing Comparison=
Why is there a need to compare when orange is the best tier emblem and all resources should be allocated for them? Answer is that, you may not have that much resources to allocate to a single feature and the question you must ask yourself is whether you want to upgrade and equip other tier emblems intermittently or to wait for enough resource to get the best emblem to equip. In any case the choice is yours, I will just provide the analysis.
Tip: Emblem Store will have 30% discount on their items in terms of gems or souls, you should only buy any of these emblems on maximum discount. You can spend diamonds in refreshing the store or wait for the countdown until the next free refresh.
Base on the store value, below is the table to illustrate the approximate value of each emblem and Casting Stones which will be used as a calculation for cost of upgrading.
Item 	Cost
Orange Emblem 	1400
Purple Emblem 	280
Blue Emblem 	84
Green Emblem 	Gives 100 souls on dismantling
Souls 	7000 Souls = 1400 for 1x Orange Emblem. 1Soul = 0.2
Casting Stones	70
==Upgrade Costs==
Tier 	Tier	Cost 	Cost 	Cost 	Description
Tier 	Tier	Emblems	Casting Stones	Equivalent	Description
Blue 	+1 	1 	1 	154 	Power of emblem increase only for the fixed value but not for the random value. Hence it is very difficult to estimate the true increase in power vs the cost. To satisfy those who are thinking whether to upgrade blue emblems, it is a strict NO unless you are willing to spend 310 (maxing to +2 needs
another emblem and one more casting stone) to get a limited increase of power.
Purple	+3 	3 	9 	1050 	A maxed out purple emblem gives the same random value comparable to a +0-orange emblem and 1.75x the fixed value. Total cost including base value is 4200. One important point to know that on dismantling a purple emblem you only get half its value back in terms of souls.
Purple	+4 	5 	15 	2450 	A maxed out purple emblem gives the same random value comparable to a +0-orange emblem and 1.75x the fixed value. Total cost including base value is 4200. One important point to know that on dismantling a purple emblem you only get half its value back in terms of souls.
Purple	+5 	8 	25 	3920 	A maxed out purple emblem gives the same random value comparable to a +0-orange emblem and 1.75x the fixed value. Total cost including base value is 4200. One important point to know that on dismantling a purple emblem you only get half its value back in terms of souls.
Orange	+1 	1 	5 	1750 	A maxed out orange emblem is roughly equivalent to a +1.75 of an upgraded orange emblem which cost about 4287 (you can work out the exact math if you wish base on my values provided).
Orange	+2 	2 	10 	3500 	A maxed out orange emblem is roughly equivalent to a +1.75 of an upgraded orange emblem which cost about 4287 (you can work out the exact math if you wish base on my values provided).
Disclaimer: All calculations are made based on 30% discount rate obtainable in Emblem Store. The actual value/cost is higher thus to upgrade an Orange Emblem to +10 - may take close to 50k or more and its not realistic to plan for all units to reach that stage.
=Verdict=
* Dismantle all Green Emblems unless temporary filling up a set.
* Blue emblems are not worth upgrading, dismantle when a Purple is available.
* Purple upgrading is worth it in short and mid-term playing but lose out in long-term playing. One can provide for more units but potential in improving is very limited.
* Orange emblems are the best and should be focused and upgraded gradually.
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