Tier 5 draconic is mandatory for ruins. The mantle is also ok because it is activated with any spell and gives spell cooldown reduction (good for your IKs too). However, the output is a single element and as a wizard that really sucks when immunities inevitably appear, so you may have to switch to another element in some quests resetting the ED or have the primal mantle as a backup. Of course, the points are very tight and having the backup mantle means giving up spellpower, and that hurts. When the cap goes up with the next expansion it should be possible to take the mantle without sacrificing spellpower, although then you will be sacrificing raising more Magus lol. Decisions decisions.
The primal mantle has the problem that it is activated with fewer elements. That is a problem for the wizard because it has quite large cooldowns, and it makes the dps with this mantle lower. However, this mantle has the advantage that the output is two elements, which helps with immunities. Thorn mantle is the best (triggers with force & acid and shard storm is lovely)
For the second ED I recommend either primal or shadowdancer. Primal is what I usually take with wizards who have a certain number of extra ED points: +2 int, temporary hit points (shard storm), evasion, crit damage, cocoon to help others, maybe even backup mantle. Shadowdancer provides spell cooldown reduction and evasion. Evasion is very useful to survive when wearing robes, and getting it is much cheaper in shadowdancer than in primal (something to consider if you have few epic PLs).
For third ED I recommend Magus or Exalted angel. The latter is basically for the wings for greater mobility. The Magus provides more DC to phantasmal killer and nullmagic. Both provide more spell points.
Mix as you wish, but I try to get the third tier spell DCs to give me Necromancy, Enchantment, and Illusion. Be careful, because primal is limited in this regard (it only provides enchantment). But primal gives more DC (more int)... and not the ED that according to the devs they designed for the DC casters. Of course, of course.
If you still really like the mantle of the magus, then you could have the mantle of the draconic linked to acid as a backup, since you will have to go up to tier 5 due to intensified ruin. I don't think this is as efficient (and you lose the cooldown reduction, which is better for a DC caster than anything from the mantle of the magus! Nullmagic Strike is disappointing, too limited), but with the recent changes the mantle doesn't suck as much as it used to, although it's still tied to two elements with too many immunities to be useful to the wizard. But it could work with a draconic-magus-shadowdancer template, although the trade off for raising the magus so much is significant.
Basically, the devs played a bad joke by putting a intensified ruin in ED for the sorc, since ruins are feats more intended for wizards than for bypass casters, who have always had other viable options. And then they completed the joke by adding a mantle designed for specialists in the wizard's ED, so the magus mantle is more useful for cold sorc, druid or alchemist than for the wizard. How much love for the wizard, right?
Forget about the background of the EDs, since the devs have also done it, and look for numerical synergies with the way you play your wizard, that is my advice. In DDO there is no perfect, unique and wonderful build, for each build there are usually several viable combinations. But be careful, because with the wizard it is easy to slide into areas of uselessness, there is not much room for error. Basically everything is designed for different playstyles than the one the wizard demands.
