Ace from AK vs suit but;

A from AK when we pass out a weak two bid or lower

In preemptive auctions higher than above leadK

At 5 level no matter what lead K

When partner of a TO dobler is on lead lead K

Roman mud (2^nd highest) throughout (opening lead and middle of hand)

4^th best with honor

Smith Echo

J, 10, 9 = 0 or 2 only during hand

K from AK then shift to another suit = singleton in shift suit

Odd even first discard

Regular count and attitude

Vs NT K asks unblock Q asks attitude

Lead 9 from honor 98 ( lead 8 from 98XX no honor)

Attitude in general at trick 1

If visible singleton suit preference (no presumed singletons)

If 3^rd hand is known to have length in suit then middle is encouraging and high low is suit preference