What are the grounds of ineffective assistance in a criminal case?

Turning to the other grounds, our inquiry is guided by the principle that "[i]t is particularly difficult to prevail on an appellate claim of ineffective assistance. On direct appeal, a conviction will be reversed for ineffective assistance only if (1) the record affirmatively discloses counsel had no rational tactical purpose for the challenged act or omission, (2) counsel was asked for a reason and failed to provide one, or (3) there simply could be no satisfactory explanation. All other claims of ineffective assistance are more appropriately resolved in a habeas corpus proceeding." (People v. Mai (2013) 57 Cal.4th 986, 1009.)