invest in forum gold? ...wha? why?
back to the topic - just to give you guys a visual
every El that drops after El slot is at 99 = Eld Rune.
once El and Eld are at 99, every El and Eld that drops = Tir Rune
every El, Eld, and Tir rune that drop when these slots are at 99 = Nef Rune
so you can see the exponential growth as you saturate each slot. my current progression is 99 in each slot up to Hel rune w/ 99 in the Dol slot, so EVERY rune prior to hel is converting into hel rune. (not exactly like this as you need to resaturate each slot prior to your highest saturated slot w/ 2-3 runes for each respective slot, but this is almost negligible as your low runes are just going to continue to power you through!)
Sorry mate but if everyone tells you it's a bad idea you might need to think about it
Also i'm pretty sure that you can sell 3 rals and buy a Ko
Sell 3 Ko and buy a lem
So 9 ral -> lem
1000% faster than cube
Also if you really have 99 of each
Then you should sell 99* sets of (Tal thul ort amn hel)
At 20fg the set you will get rich af before you even think of converting those
Converting runes into cube is really useless unless you really need a sol early ladder and you're ready to cube 3 amn or smthg similar