Here's my opinion, not considering the skills directly linked to the attributes even though that's something rare to happen.
Expertise - 10/10 - Allows Rangers to be Rangers, being an incredible energy management that doesn't even give you energy directly, and hey, you aren't even using a skill slot for that. Unfortunately, Ranger haters have to accept it's perfect, because it only does not affect skills you shouldn't be using anyway. And it synergizes with ALL ranger skills, affecting some skills from other professions comes as a bonus for me.
Critical Strikes - 9.7/10 - Works great as energy management and also is useful for damage, unfortunately, only as long as you're dealing criticals (ie: your target blocks a lot), no criticals and see you later Mrs. Energy, as Assassins usually require heavy energy usage.
Soul Reaping - 9.5/10 - Incredible energy management without using a single skill slot. Unfortunately, when there are no creatures dying, is a huge waste of atribute points.
Divine Favor - 9.3/10 - Completely sinergizes with every ally-targeted Monk spell. Unfortunately, Monks can use offensive spells and signets, which obviously do not profit from this attribute.
Energy Storage - 9/10 - Makes an Elementalist have an undeniable energy pool and allow Elementalists to survive with heavy Exhaustion. The problem is that it gives too much energy, and if you ever run low on energy, it will take a really long time to recover.
Fast Casting - 8.7/10 - Makes Mesmers virtually interruptible, and allows them to virtually interrupt anything. Doesn't synergize with Signets though.
Mysticism - 8.6/10 - Allows a Dervish to keep himself heavily enchanted in a way no other profession would be able to, unfortunately, if you are already at full energy, you won't benefit from it, except for the Health which will not save you from heavy degen or spikes, works really only as a health filler, but I think natural renegeration has already been created for that purpose. Dervishes energy pool is usually low for a 4-pip character.
Leadership - 8.5/10 - Paragons have 2 pips of energy regeneration, yet they can spam chants and shouts thanks to this attribute. Unfortunately, a lone Paragon is an energy-less Paragon.
Strength - 7/10 - Synergizes with attack skills only, and as a Warrior relies on attack skills, that's not bad. Maybe it would be better if it worked on attacks regardless or being used a skill or not. Unfortunately, it requires a high allocation in order to make a decent difference in the damage output.
Spawning Power - 6/10 - Only affects three types of skills: Nature Rituals, Binding Rituals and Animate Spells. The latter is not recommended because of the energy required. Ritualists have a lot of other skills besides Binding Rituals, don't you think?
