So is it better to not use up the abby demon card over the others first because RoB DnD will always give out the card your missing?

 

Seeing the x-amount given in a task, abby demons will use it up 1/3 of the task in.

 

Is it TD>Glacor>Automatrons>Abby Demon in card value?

 

And for people who has used them how much better does your rare drops "occur".

Let me rephrase the questions:

 

If I have 3/4 cards possible will I always be guarantee the 4th missing card no matter what?

 

Presumably should I not bother using the abby demon card due to it having a higher value by giving myself a higher chance to get the other 3 cards?

 

Have you noticed any significant changes to rare item drops using the card?

I am by no means an expert on this but seeing as no one has answered as of yet, I'll give it a try.

 

The chance of receiving a card is #/20, where # stands for the number of the waves that you have currently completed.  So if you have done 10 waves, the chance is 10/20 = 1/2.

 

Only one of each card can be owned at a time, so my guess is that if you own 3/4 cards, you will be guaranteed the 4th card IF you are awarded a card at all.  In other words, if you have 3 cards and complete 10 waves, you will have a 1/2 chance of receiving the fourth card.  If you complete 20 waves, then you should be guaranteed to get the fourth card.

 

Each card increases the chances of receiving specific drop from that monster.  I'm not sure about what the frequency, but the drops that have an increased chance are the following (with links):

 

Abyssal demon - Abyssal whip/abyssal wand

Glacors - Glaven boots, Ragefire boots, or Steadfast boots.

Tormented Demons - Dragon claw, Off-hand dragon claw, or dragon limbs.

Automatons - Pneumatic gloves, Static gloves, or Tracking gloves.

 

Another thing to note is that the card turns to dust after receiving a unique drop (i.e., one of the items that I've just listed).

You will be guaranteed the 4th card if you have all other 3 (and complete 20 waves). I've been doing it for a few weeks with TD cards.

 

Another thing to note is that the card turns to dust after receiving a unique drop (i.e., one of the items that I've just listed).

 

Not entirely. The drainage is dependant on the item. Dragon Claws drains 20/100 charges. Dragon limbs drain over 73/100 (and my task was at 27 when my card activated and it got dusted). Abyssal whip drains 30/100.

Thanks for the correction.  I'll submit it to the source I got it from (RuneHQ) so they can update it :P.