The Crystal Dreamer is an incredibly powerfull build, able to dominate everything (cycle 6 so far) without any item or luck involved.

The goal is to have a good minimum speed, and perform "stand still" actions that trigger "on game turn" effects multiple times per turn.

Race: Arjana, apply more Freeze stacks
Class: Priest, apply more Freeze stacks
Deity: Agara, perform "Stand Still" actions when praying, and add a lot of prayers per zone

Stats on level up:
2/3 Strength
1/3 Dexterity
No Willpower

Always add Strengh if it increase minimum speed, else add Dexterity

Powers:
Cristalform: freeze all ennemies on "Game Turn", and activate "on game turn" actions on stand still
Master Freeze: does immense amount of ice damage on all frozen targets on stand still
Master Repulsion: prerequisite for the prestige, and provide a good amount of block
Dreamer prestige class: activate "on game turn" actions on stand still

Upgrade both Cristalform and Master Freeze, they should be about the same level, with Cristalform maybe a little higher.
No other skills needed!

Usefull items:
Kairos Skirt: perform "on game turn" on stand still
Crystal Helm: more freeze stacks! And give a point in picking up any other inflexibility item

Perform any prayer, each turn, until everything is frozen to hell!

Each prayer will add Cristalform stack on you, and trigger all stand still actions.
CristalForm and Dreamer (and Kairos Skirt if you have it) trigger all "On Game Turn" actions when you stand still.
On game turn, CristalForm will freeze ALL ennemies based on its stack. At the end, it's hundreds of stack applied.
On stand still, Master Freeze will do two things: apply Freeze stacks on you (augmented by your race, class, etc...) and deal Ice damage to every frozen ennemy.
To be precise, it will deal (Freeze stack on yourself x Freeze stack on ennemy) damage
Which is absurd!

With this combo, you can deal 1M+ damage easily.

With a good minimum speed, every combat will be like this:
Action 1: Prayer: Cristalform is set up
Action 2: Prayer: Freeze all ennemies (their speed is shotdown)
Action 3: Prayer: Does insane damage, kill every small ennemy
Action 4: Prayer: Everything is frozen to hell

The only opportunity when you can get attacked is between your first and second action, but you should have enough speed so that is a rare event, and enough hp to tank it.

Cristalform will heal you if needed, and the frozen ennemy will have abysmal speed, allowing you to take the 2-3 turns needed to freeze and kill everything.