Given what you said you were looking for, I'd say this:
http://skyrimcalculator.com/#116729
Bladesmen is currently useless because it's based solely on the base damage of the weapon, so it's not going to do a whole lot. I've only ever found the middle branch of the Enchanting tree useful. Necromage is really only useful if you want to become a vampire, and Ward Absorb isn't that great. Oblivion Binding and Conjuration Dual Cast aren't that great either because there aren't enough Daedra to make it worthwhile and the Thrall spells are the only Conjuration spells that are worth using after you get them and they're automatically using two hands.
I agree with your points about Bladesman and Conjuration Dual casting. On Oblivion binding, I think it depends on whether the plan is to use primarily bound weapons. If so, then the Oblivion binding perk is really nice to have when fighting summoners and necromancers since one hit will deal with any type of zombie or summoned creature. On the other hand, it is not usually worth it casting a bound weapon spell just to deal with a summon, so if a bound weapon is not something that you are going to be using all the time, then I'd skip all the bound weapon perks.
I would not combine all those conjuration perks with the Atronach perk because of the bug that absorbs summoning spells. It is problematic having your summon abosorbed in the middle of battle. If the plan is to summon permanent thralls outside of battle, then I would cut down on some fo the cost reducing conjuration perks and just put on some gear when it is time to summon your thralls.
Ward Absorb is not that great, but if the plan is to use wards a lot, then it is useful and there are no prerequisite perks other than novice, so it is pretty cheap. Personally I would take ward absorb over Rune Master any day of the week, since Runes are not much more than firecrackers at higher levels.