Its not a runic or a slave spell so obviously its not meant to be always useful.
Wait, does this meant that runic spells are meant to be usefullß Cause mine sure is not, I found one fight so far where it MIGHT be usefull, and even there it is questionable.
Basically it makes any spell you cast after its cast unblockable. No reflect, no counterspell, no resist no nothing.
You mean, any spell you cast while it is on you, wich means essentially 2-3 damage spells cause its fading the moment you start nuking.
You can also cast it at the beginning of a fight if you wish and use it on any type of spell.
So effecitvely I can now concuss at the beginning of a fight without worrying that they get resisted. No wait, I don't worry about that anyways, I just pay attention and cast one more concussion if one gets resisted.
Is it something you will use often? No. Can I name 5 or so fights where it would be used extensively? Yes. Will it be used sparsely (yet still be used) other than those fights? Yes. Or at least should be!
Please name these fights, maybe in a PM to avoid strat spoilers. Also please explain me how a spell with 6 min recast and a duration of effectively 2 ticks (fade time) can be used extensively in any situation.
Summing up ikisith wizard spells:
Abstraction of Flame is usefull in AE group situations, but the 5 min recast is quite limiting to that use.
Runic: Intensify is of questionable usefulness at best, I know only one fight in the entire game where I consider it to use it. Also, yet again a spell with a long recast, and even longer time to be usefull.
Arcane Acuity is supposed to make spells bypass whatever spell defense a mob has. This would be usefull if it wouldn't fade you start doing your class job: nuking. In it's currently intended form, it means that one could land ONE nuke every 6 min, guaranteed. Reality is though, if a mob counterspells or reflects, landing one spell doesn't really help, the next spell will just get counterspelled/reflected as usual. If resists are the problem, just go to another resist type, or use irresistable relic lure. Doing some math for resists being the problem: Arcane Acuity (600 mana) followed by a Moon Comet (525 mana) sums up to a total of 1125 mana for 4707 damage. Casting Relic Lure x2 costs (725x2) =1450 mana for (3606x2) = 7212 damage. Thats 2.5k more damage for only 300 more mana. Considering these numbers, using AA/Moon Comet is a waste of time and mana.
EDIT: Oh yeah, ports to dreadlands and murk. These are funny if anyone in the group is still KoS to the faction in question, cause they will be gibbed by guards at the portin. Other then that, I like em.
tl;dr
So far all ikisith wizard spells are very situational, and with the exception of Abstraction of Flame, just plain terrible.