Re: Re-rolling jewels
Just to clarify- the fact that it already has IAS on it means that it is ilvl 39 or higher, as otherwise the suffix "of Fervor" couldn't spawn. Since the other affix you are looking for "Scintillating" is alvl 34, it could potentially spawn on any jewel of ilvl 34 or higher. Since rerolling won't change the ilvl of the jewel (even though some much lower affix level affixes will probably appear during the many many rerolls you attempt) you will always have a chance at getting your desired jewel. One of the difficulties on the realms is that you cannot inspect the items to see what their ilvls are, so you need to either keep careful track of what dropped where or keep an eye on the affixes to deduce what the ilvl could be. In SP, you can use ATMA or GoMule to see ilvls directly, which means you don't need to be careful about what is where.
Another thing worth mentioning: Scintillating is quite a rare prefix, with frequency 1, which means that it is 4 times less common than many not particularly desirable prefixes, like +5-8 defense, +16-25 stamina and many others. To get your desired jewel, four things need to happen:
1) the game needs to roll that the jewel gets both a prefix and suffix
2) the prefix needs to be the quite rare "Scintillating"
3) the suffix needs to be "of Fervor"
4) the Scintillating prefix needs to roll 15 out of the 11-15 possibilities.
Good luck! Most people think that rerolling GCs is a better use of PGems, by the way.