When it comes to Summoners War, there is no doubt that Runes are considered to be the most important and significant. According to experts who know the game well, there is no point having the best of monsters that one might know, unless they are not accompanied by the right runes. Hence one should know which war runes to keep and which to sell. This is not easy and only those with experience and expertise will be able to answer as to which Summoners war runes to keep and which to sell. We will try and get some useful information about the same over the next few lines for the benefit of our readers and also for those who love Summoners War Runes.
Identify As To What Constitutes Good Runes
To begin with you should not what are good runes and what are not. Only then will you be able to decide as to which runes you could keep and which you could dispose off. It may not be possible to give a clear cut answer to this question but there are some basic which could give us some idea as to which runes are good for keep and which should be trashed. We should understand that each and every rune will have its own substats and this naturally will be a part of the main stat. Hence as a thumb rule, you must be sure that the substats of a particular rune should mesh with the main stat.

This will decide on the rune type and the type of monster to put over it. For example if you come across a fatal rune the same should be immediately marked for sell or disposals. However, this is subject to the main state being DEF% and also have Resistance%.
Hence the secret lies in choosing only those which are considered best for support runes. This could include Will or Energy. You should also be sure that fatal runes are used only for monster which are doing the role of attackers. One specific example that comes to the mind is Taor.
Understanding Substats Better
There is no doubt that even the best of experts find substats a bit confusing to say the least. You must know how to hand substats because it could help to make or break a rune. This being said the world of substats is still mired in suspense and even the best of players are not aware as to what exactly lies in it. You must know a bit about Quad rolls if you wish to have a clear idea as to which runes to keep.

These rolls will happen when you are in possession of a legendary rune and this is when the power of all four substats goes into one substat. Hence in such situations, it would always be better to keep quad rolls because they have stronger power being united.
The Final Word
The above are just a few of the important things that one should bear in mind when it comes to keeping or selling runes. There are quite a few other tips and studies which you must try and gather if you are keen on mastering it to some degree.