My mage has always run protection; so after over 20 years I'm use to her casting speed. I could solo kill all the paragons in Ice - many times without even dying even on the drakes. If help was offered, sure it was great - went much faster; but if not; I killed them myself and moved on. My mage is 120 magery, eval, mysticism, focus, Spellweaving, and med. I use the SW 3 primer. I have around 135 hit points, 230 mana, way too much mana regen, and with the invasion spellbooks I was using had about 80 sdi.
Like someone said above, find a spot where you have running room and check it often and try to keep it as clear as you can. When there is a para you can't shake take it there and kill it. It takes a few kills to work out the distance you need to run to have time to cast. Some paragons, you can take a hit or two before you have to run to heal. The first week was a lot of trial and error and death. This is what worked best for me.
The ones below I could stand there and let them hit me while I killed them:
Frost Oozes - Ice Slayer and used 1 flamestrike FS) - gotta love overkill!
Ice Snake - Ice Slayer and used a FS (think some needed an e bolt too)
Frost Spiders - Ice Slayer and used 1 FS and then 1 e-bolt
Rats - Ice Slayer (I have a vermin slayer but I had enough spellbooks to deal with and they died easy enough.) The mages took a few more FSs than the other two.
Giant Ice Serpent - Ice Slayer and used couple of FSs
Frost Trolls - Ice Slayer and used a few FSs
Ice Elemental - Snow Elemental Slayer - 2 FSs
Snow Elemental - Snow Elemental Slayer and a few FSs with heals in between
This second group I ran them to the long hallway by the WW nest area (if they hadn't died on the trip):
Ice Fiend - Ice Slayer and FSs (These really weren't too bad as long as you stayed ahead of them.)
Artic Ogre Lords - Ogre Slayer and FSs (These would hit me for around 40 so as long I healed after a hit I was fine. I tried EVs but found they one hit killed them so it wasn't worth the mana use for me.)
White Wyrms - Dragon Slayer and FSs (Their Mana Draining probably killed me more than their spell casting or bites. I cast greater heal and while waiting for it to hit - BOOM mana drain to one mana and then the unseen ice snake bites me and I die! They pretty much auto poof the EVs so again it wasn't worth the mana use for me.)
Drakes - Whatever book was in my hand since they have no slayer (hint hint - give them a slayer!)
FSs again. EVS were a godsend with these guys. The drakes would latch on to the EVs and stay put long enough to get a few FSs in. Once EVs poofed - run and repeat. Their bites and spells weren't bad it was the 60 damage of their dragon's breath that hurt. Just had to be careful and watch for that hit and heal up right away. Once they got below half health, their dragon's breathe damage was reduced enough I could just stand and FS them without running to heal.)
And all that was how I killed the paragons in Ice Dungeon. I mainly played in their late at night. (I was never alone in there on Chessy.) I was just planning on getting a few short hedges then quitting it but I ended liking the armor color so I decided since I had so many drops I'd make a few suits. I got a spellbook (just because it was a pretty blue and stuck it on my crafter), 75 short hedges, and about 14 complete suits. (And yes after over 600 drops, I never got a bone helm but was lucky enough to be able to buy one. I think that's why most people stayed in the Ice Dungeon throughout the event - not for the rewards but for a bone helm!) I really did not push it until the last week so I could get those missing suit pieces.
Popps - I really hope you read all this, digest it, and understand the main idea. Use the toon you most enjoy fighting with and take the time to learn what works best for you in order for you to reach whatever goal you have. Understand sometimes you may have to change a skill or suit piece in order to reach that goal. You may even have to take advice from others players. Paragons have been in the game since well forever. While they are not the most pleasant things to fight, if you want to do certain content, you will have to learn to adapt and fight them.
Everyone Else Who Made It Through This Post - It was late and I was doing BODs in between paragraphs. It helped pass the time while was waiting on my alchemy station to churn out all my potions.I had coffee and King Cake today so I'm on enough of a sugar high to actually hope this helps - well anyone.