Sleep 

My current favourite skill in Requiem, it makes soloing a lot easier. At lvl2 it becomes an aoe spell and ticks for 7 sec. Mobs remain asleep while you blast them into bits with your elec bolt. Melee damage or anyone else attacking wakes them up, so it’s not party friendly but a true life saver for soloing.

Edit

Only melee damage wakes up the mobs, party members can freely inflict damage with spells

Godly Mirror

It’s still very low to make a difference, but if it works as it is intended, it may very well be one of your most useful skills. Basically you can end up having 70% chance of reflecting 70% of the damage you take. It is huge, especially given how defense works ( 10 points of def decreases the damage you take by one point) As I see it, the higher the damage the mobs inflict, the better Godly Mirror gets requiem lant compared to defense.

Survival Instinct

Passive skill that adds to your def, better to have than not I guess, but wont I spend many points on this one

Divine Protection

Target spell, increases defense, good to have as a support character. Unfortunately its not available until lvl20 and it doesn’t stack with ion shield.practically making the latter redundant. And you’re pretty much forced to take ion shield at lvl10-12(requiem lant and Requiem powerleveling), unless you plan to focus on melee. In that case you can take Holy Strike instead.

Salvation

Resurrects, don’t suppose it’s worth to invest more than one point here

Rejuvenation

Comes very handy for self-healing, cheap and instant cast. At lvl2 right now, I’m not planning to increase it any further.

Lesser Heal

No brainer for a healer. Found the DNA that reduces its casting time to be quite handy.

Lesser Party Heal

Seems useful too

Elec Bolt

Offers medium damage, not comparable to the shaman’s fireball, but it is your bread and butter. You should keep it maxed all the time or until you find another offensive spell that better suits your needs.

Electric Twister

Picked it up after realizing that it is the only offensive skill with a DNA available to boost its damage.

Concentration:

It Increases your MP recovery, which is of course crucial. At lvl 3 with DNA it adds only a single point to my MP regen. As its % based it’ll probably start to shine later on (at lvl5 with DNA it adds +25% to your regen) , but right now it seems pretty useless.