I've heard from a few people asking "How do I prepare my Magic Items?"
Here's what I did, and what might work for you:
1. List out all the Ritual effects on your items.
2. Mark off, for each item, which of those effects are in the "removed" or "changed significantly" lists from the Playtest Packet.
3. Count up this total for each item.
4. Go through the list of new rituals and write down which ones might be interesting for your character.
5. Start putting in new rituals up to the total number of "removed" or "changed" rituals from step 3.
6. Allocate these appropriately to the items.
For example, let's say I have a character with the following items:
Two-Handed Sword
Spell Parry x2
Item Recall
Channel Spell: Purify x1
Expanded Enchantment: Cure Mortal Wounds x2
Pouch
Cloak: Curse x1
Cloak: Gift x1
Cloak: Alteration x1
Cloak: Binding x1
First, I go through these items and mark off which ones need to swap out. From the sword, that's the Channel Spell and the two Expanded Enchantments; Item Recall and Spell Parry don't change, so they stay as-is. From the pouch, that's all 4 Cloaks.
So now I have a total of 3 Rituals from the sword, and 4 from the pouch.
I go through the Playtest Packet and a few of the new Rituals really seem to fit for the character. I write down Empowered Armor, Elemental Strike, Heroic Interception, Empowered Warrior, Retribution, and Spell Swap. I can pick a combination of 7 of them total to swap out; 3 for the sword, and 4 for the pouch.
Looking at these rituals, I decide I want 2x Empowered Armor and 1 of each of the others for a total of 7. Now I need to reallocate them to the items I have.
Some of these rituals are specific targets: Item<Armor> for the Armor rituals and Item<Spellbook> for Spell Swap. As per the Playtest Packet, this allows me to change their targets so I can try them out. I end up with:
Two-Handed Sword
Spell Parry x2
Item Recall
Heroic Interception x1
Elemental Strike x1
Pouch
Empowered Warrior
Retribution x1
Spellbook
Spell Swap x1
Armor
Empowered Armor x2
To actually prereg all this, I first go to the Character Management App and put in my new character. Then I prereg via the app for the event, and in the "Notes" field I put:
-----------------------------------------------------
I currently have these Magic Items:
Two-Handed Sword
Spell Parry x2
Item Recall
Channel Spell: Purify x1
Expanded Enchantment: Cure Mortal Wounds x2
Pouch
Cloak: Curse x1
Cloak: Gift x1
Cloak: Alteration x1
Cloak: Binding x1
I'll be changing these out to these items for the Playtest:
Two-Handed Sword
Spell Parry x2
Item Recall
Heroic Interception x1
Elemental Strike x1
Pouch
Empowered Warrior
Retribution x1
Spellbook
Spell Swap x1
Armor
Empowered Armor x2