Levistus's_Leviathan
5e Freelancer
2 turns, from my version of the feature, as well as requiring concentration, and a requirement for the imbued weapon to hit within 2 turns of the first attack roll, or else the spell is wasted. It takes a bonus action at level 12+. Also, putting a fireball in a melee weapon would force yourself to take the damage from the fireball as a part of that.You said you want to "blend spellwork with combat" if that means casting a full leveled action spell on the same turn you attack, that is 2 actions in one turn
Stop telling me and others that any version of a Spell Strike feature is going to be OP, especially when you haven't even seen the current version of the feature.