Casting two full action spells in a same round is not as powerful as many of you think.
Evoker Wizard has Overchannel that maximizes the damage of a spell = 100% damage value.
Casting two spells in a row = 2 * 50% (average) damage value = 100% damage value.
Two spells can be different for combos and variety, but one maximized spell uses only a single spell slot, so both have pros and cons.
Overchannel is a high level feature, but it is also compatible with Sculpt Spells, allowing to release maximized damage spell that does not hurt allies, while Sorcerer can pick either bonus action cast or Careful Spell and not both.
Overchannel has a health cost (after first usage), Quicken Spell has constant 3 SP cost and reduces / removes possibility to use other class features (spell slot cycle / other Metamagic options).
Evoker can also essentially double damage of Magic Missiles with Empowered Evocation and spam their double cast analogue for single spell slot and with no drawbacks.
What I am leading to is that double full spell cast via Quicken Spell could be kept in the game, as it essentially makes Evoker Wizard and Draconic Sorcerer competitive as blasters at high levels. However, I definitely think that getting 3+ spell casts in one round is too much, so would rather see some restrictions to things like Circlet of Fire instead. For example, Quicken Spell could be usable only once per turn, so that no matter how many bonus actions you get, you can cast only a single quickened spell.
Last edited by Volsalex; 20/09/22 08:25 AM.