more necessary clubs, but the number of them is undefined:
irons. you have to have irons. my current set is second run cavity-back callaways. they go 6-7-8-9-pw-sw (p = pitching wedge, s = sand wedge). so that is six more clubs, but they leave me feeling lacking. the 6i is a short club, you cannot pound it for low straight distance. my favorite club as a youth in my previous golf life was the 5 iron, i could hit it like throwing darts, adjust my body and technique not the club, and i don't have one now. i have already regretted it.
this brings up another problem, the second shot medium game from the fairway or rough. the 4- and 5-hybrids don't really do it for me, i can't feel them. so you need longer irons in this situation, i would rather hit a 5 iron than a 5 hybrid, and there are rarely spots where you get a perfect fairway lie and want a 5 wood. and none of those can match the long straight potential of a 4 iron with consistent technique from any lie, unless there are trees in your way which happens sometimes, but i can always see a path through the trees although mostly it just gets caught up in the branches and drops down in a hole by the trunk.
#8, irons. 4-5-6-7-8-9-pw-sw, that is eight more clubs added to the three previous for sure necessaries. i want these all the same brand, nothing special, just predictable, and same brand matching the woods.
the 4i or 5i can sub for the gap in between 3w and 6i from any lie that i have the most trouble with now.
so i am at #11 clubs.