So I have been away a very long time and I am trying to find the tutorials. I forgot how to do random item drops. Specifically I can't remember how to get the random switches right. Also, I am curious about the DC method. Been a year and I don't remember. If you could point me to the tutorials that would be great since I can't navigate this site anymore.

I remember little things like a repeating death counter and splitting something into increments with one, but that's about it.

The wiki is rather hard to get to nowadays, I don't remember how to myself. Anyways, for randomization:

Triggers

Trigger("Player 1"){
Conditions:
Always();

Actions:
Set Switch("Switch1", randomize);
Preserve Trigger();
}

//-----------------------------------------------------------------//

Trigger("Player 1"){
Conditions:
Switch("Switch1", not set);
Whatever you use to detect when to drop items

Actions:
Insert actions here
Preserve Trigger();
}

//-----------------------------------------------------------------//

Trigger("Player 1"){
Conditions:
Switch("Switch1", set);
Whatever you use to detect when to drop items

Actions:
Insert actions here
Preserve Trigger();
}

//-----------------------------------------------------------------//

The first trigger will randomize a single switch. The following two detect the switch's state, and would require additional conditions to prevent constantly dropping items. I put the Always condition in because I've found it's much easier for a switch to be constantly randomized, rather than wait for a pre-existing condition make it run. Of course, you can put multiple switches in, but this is a simple example giving only two outcomes.

This will help find the old Wiki articles/tutorials: http://www.staredit.net/topic/13129/

Randomization with switches is pretty easy actually. You randomize a bunch of switches and for each possible combination of set and cleared states of the switches you make a trigger with actions of one of your random events.

Number of possible combinations is 2^n where n is the number of switches. So if you need 10 combinations you need 4 switches (2^3 = 8, which isn't enough). Those 4 switches have 16 possible combinations so either make triggers for only 10 combinations and re-randomize if none of those combinations has been hit or use the 6 additional combinations to boost probability of a trigger getting selected by copying it and changing the condition to one of the 6 unused combinations.

If you understand binary, you may find this explanation a bit easier: you are randomizing each bit of an N-bit number, where N is the number of switches you use.