tModLoader Shield ideas

[Solar12345]

So I'm making a whole line of shields and wanted to ask if these shields seem/sound balanced to you guys. I have not finished sprites for almost all of them and I kind of base what it's made from off the sprite so ya. I'm going to have a shield for every Greek letter so I'm going to have more so expect an update on this post for more help later. They can be obtained Pre-Skeletron.

Alpha Shield -
Melee damage +5%, Movement Speed +2%, and +3 Defence
Crafted from 5 Iron/Lead Bars, 10 Wood, and 5 Ruby's

Beta Shield -
Melee damage +5%, Magic damage +4%, Movement Speed +3%, +5 Defence, and +10 Mana
Crafted from Alpha Shield, 5 Amber, 5 Topaz, and 20 Stone

Gamma Shield -
Melee damage +9%, Magic damage +6%, Throwing damage +7%, Movement Speed +4%, +7 Defence, and +15 Mana
Crafted from Beta Shield, 15 Emerald, and 15 Iron/Lead Bars

Delta Shield -
Melee damage +14%, Magic damage +10%, Throwing damage +13%, Movement Speed +4%, +8 Defence, and +15 Mana
Crafted from Gamma Shield, 20 Sapphire, and 100 Stone

Epsilon Shield -
Melee damage +16%, Magic damage +14%, Throwing damage +15%, Summoning damage +12%, Movement Speed +5%, +10 Defence, and +20 Mana
Crafted from Delta Shield, 20 Gold/Platinum Bars, 15 Copper Bars

One more shield that I haven't gotten ideas for yet...
So do you think this is good pacing or change some stuff?