Wand (and also scroll) of create traps is a valuable item. Do not throw it away!
When activated, it generates a trap into every place adjacent to you, where you can step, except doors and stairs. Choose a place in the middle of a room and each of 8 adjacent places are filled with traps! You can get a lot of points, disarming them, and, as disarming traps lasts at least 8 minutes, it also works as healing minor wounds.
Do not use it, if monsters can attack you. You cannot run away, there are traps enerywhere.
The wand (or scroll) of summon monster is also valuable. This creates only 1 monster adjacent to you, not 8 in each direction. The monster can attack you first, but usually it is not very tough monster and if you kill him, you get points again.
I am not sure, does the monster, created by summon monster spell, depends on floor you use it? Does it work differently on Crossroads, on 1st floor and on 25th floor? I summon monsters in the deepest levels, hoping to get tough monsters, whose killing gives more points.