(Yes, i do realize that by accident i named the title with "Sell Runes" which actually is suppose to be "Combine Runes", sorry for the mistake, but i don't know how to fix it...)

Ok, so we all know about the cool feature League of Legends has to offer with Runes which can give some amazing advantages over enemies IF used properly..

They also decided to provide a Rune combining System to allow user's to Combine runes to produce the same (or better) runes of a random type.

Some of us have wondered that massing smaller runes to produce greater ones will have a very positive effect while others (such as me) don't enjoy the random generated rune system and would rather have that nice 100% chance of getting the runes we desire.

Listed below are Several Cases which show how in each aspect they can be positive of negative...

Some of the least expensive runes in the store right now are worth 15 IP. Ex: Lesser Mark of Strength +0.18 Dmg .

If we theoretically bought 5 of the same kind and then combined them together we will then generate a random Tier 2 rune. At the total cost of 15 x 5 = 75 IP WHICH is pretty good.

Considering that the normal cost of tier 2 runes is approx ~165 IP

BECAUSE we want to know it's EFFECTIVENESS we will use a total of 75 x 2 = 150 IP points to create tier 2 runes. (Which is the near the same value as buying directly from the store a tier 2 rune for 165 IP)

Also we can consider the fact that if we produce two random tier 2 runes we can combine those two further to obtain another random tier 2 rune.

So in the end, using 150 IP you have 3 chances of getting a Specific tier 2 Rune using collectivly tier 1 Runes with a value of 15 IP. OR you can use 165 IP to have a 100% Chance to obtain a tier 2 Rune for 165 IP.

The total possibilities of getting a rune are dependent on how many different types of runes there are and what you want.

The different Runes are

HP

Reg Hp

Mana

Mana Reg

Armor

Magic Resistance

Damage

Ability Power

Armor Penetration

Magic Penetration

Dodge Rate

Critical Strike Rate

Crititcal Strike Damage

Ability Cooldown

Which gives us a total of 14 different possibilities...

Because we have 3 chances of getting a specific rune of tier 2 from the possibilities of 14 different kinds, that leaves us with a ~21.4% chance to get the specific rune we wanted.

Tier 2:

21.4% Chance to get a specific tier 2 Rune you desire for 150

OR

100% Chance to get a specific tier 2 Rune you desire for ~165 IP

kinda more reliable to just buy the Rune from the shop eh?

NOW, lets use Tier 3 Runes.

If we did this 5 times, and tried to get a tier 3 Rune we would use 375 IP to get a randomly generated rune of Tier 3.

The least expensive tier 3 runes are 205 Ip, and the most expensive are around 2050. Each batch of tier 1 runes of 15 Ip (each batch costing us 15 x 5 x 5 = 375) would produce randomly a Tier 3 Rune. If we decided to compare this cost with that of 2050 IP then a little bit more math is going to be involved....

The closest numbers 2050 can be divided by 375 are 5 and 6.

5 x 375 = 1875

6 x 375 = 2250

Using 1875 Ip we could theoretically create 5 Random Tier 3 Runes, which could create another 2 extra Tier 3 Runes (with one remaining) which could create and extra 1 tier, which can then combine finally with the last remaining tier 3 Rune, giving us a total of 9 chances to obtain a specific Tier 3 Rune.

Using 2250 Ip we could theoretically make 6 Random Tier 3 Runes which could create another 3 extra Tier 3 Runes, which could create an extra tier 3 Rune (with one remaining) allowing that one to combine with the last remaining tier 3 Runes to give a total of 11 Chances to obtain a specific Rune we desire for 2250 IP

(I hope im not confusing you too much!)

The probabilities of each one will then be...

Tier 3 Runes:

64.3% Chance to obtain a specific Tier 3 for 1875 IP

OR

78.6% Chance to obtain a specific Tier 3 Rune for 2250 IP

OR

100% Chance to obtain a specific Tier 3 Rune (from the store) for 205-2050 IP

So in the end, it doesn't seem like Rune combining is even that great...HOWEVER, please realize that there are certain "special" runes which can only be obtained from the Rune combining system.

So it isn't "completely" useless...

Also, note that most people don't mass one specific type of rune, some people might chose from 3 specific Rune such as, Critical Strike, Critical Damage and Attack Speed (mostly because there are caps on these values to stop you from becoming Chuck Norris) so the randomizing does help allow you to become more powerful in different area's.

Also note that I did NOT specify anything on the Rune colors. I decided to keep this variable out of place because it would complicate things further.

For my suggestions here is what i recommend.

-Use Rune Combining only for Tier 3 Runes. (and if it exists Tier 4 Runes , possible they might make an update on this..)

-If you filling up one of the last spots in your Rune Book I STRONGLY suggest that you do not use the Rune combining system

I hope you enjoyed this guide everyone! Thanks for reading it!

P.s. Please tell me if i had made any mathematical errors and i will correct them A.S.A.P.