Fixing True Strike

[Osuniev]

Just for the record, an offensive Plane Shift is much better than Banishment. Banishment lets you take an enemy out of a fight for as long as you keep concentrating, and then, if you can keep concentrating for a full minute, and if the enemy is extraplanar, you can get rid of it permanently. Plane Shift lets you get rid of an enemy right now, permanently, no matter its creature type.

Well, that's true, but it also cost a 7th spell slot and you need your attack to hit AND his Charisma save to fail. Most fights, if I have both available, I'd choose Banishment. I'd even more try two Banishment than a True Strike then a Plane Shift.