I go double/salvation/power though power isn't really needed. It's just an option.

Nice... well I have just started my first solo climb with Warlock, and using Dble / Multi + Salvation. Just turned level 60 last night:
It is working out nice, I just haven't found out the best pattern for my Hotkey setup [because I switch charm placement, which is affecting my reaction time]

Abilities: - Dble = 58% / Multi = 48% / Salv = 46% [just upped Salv @ 60 because having trouble healing when 3 EPs spawn, including Ambush, which I completed]

Gear is good if I was an Alchemist... ... anyway... giving me an idea of how tuff it will be if I ever get an Alchy and solo.

TierVI staff [4xx mana] / 45 int [lvl35 robe not padded] / 145ee lvl45 Foc Heal on main / 165ee lvl45 Earth acc.

Yeah for sure next time don't do multi. Go with what smokey and Ryan said. Having power and double would help manage eps better. A 200% power charge will do about 10 times over the max of your charm so it and double will help more than multi since your only gonna hit 3 monsters you know.

I have tested this, I found this ability to be useful for damage, BUT, found it harder to charge up compared to "Multicast", mind you, I will say this, the 2 main abilities I concentrate on are:

1. Salvation = survivability utmost and formost, so I will put enough point in here upto 40% charge rate.
2. Faster Killspeed = ability to survive and kill off at least 2 minions asap, so I will put enough points in here upto 48% charge rate

So, the comparison in the other two abilities suggested with my available equipment are:

1. Multistrike = less dmg, BUT deals damage to 2-3 monsters in a single attack and ALSO charges up a hell of a lot faster.
2. Powercast = max dmg, BUT only attacks ONE monster at a time... NOTE: charges up TOO SLOW

End Note: thank you for the advice, I will definately alter these abilities IF I get the gear to make them more efficient, thus, I will remain
with the other abilities.