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-   -   Probability of using Rods of Teleport Other? (http://angband.oook.cz/forum/showthread.php?t=532)

Dragonboneman February 5, 2008 11:59

Probability of using Rods of Teleport Other?
 
Can someone give me an idea of when Rods of Teleport Other might become usable by a Half-Troll Warrior? My current guy (CL 36, 18 INT) just failed to use one 50 times in a row.

Thanks in advance.

Mondkalb February 5, 2008 12:17

Rod of Teleport Other has a high level (45).
Your char has poor magic device ability (which will increase with level and intelligence). To calculate correct chance use the spoiler file:
http://www.juti.nl/hugo/Angband/Spoiler/ability.spo
This is a quote from the above mentioned file:
Quote:

USING A WAND, STAFF, OR ROD
---------------------------

To calculate the base ability of using a wand, staff, or rod, use the
following charts. Begin with the base class ability, then add the race
modifier. To take level into account, add in the product of your
character's experience level and the class bonus per level modifier.
To this add the appropriate intelligence modifier. This gives a numerical
rating of your character's skill at using magic devices.
Code:

              Bonus per
Class    Base Level      Int.        Bonus      Int.        Bonus
-------------------      ------------------      ------------------
Warrior    18  0.7      3-7              0      18/130-18/139  11
Mage      36  1.3      8-14            1      18/140-18/149  12
Priest    30  1.0      15-17            2      18/150-18/159  13
Rogue      32  1.0      18-18/19        3      18/160-18/169  14
Ranger    32  1.0      18/20-18/39      4      18/170-18/179  15
Paladin    24  1.0      18/40-18/59      5      18/180-18/189  16
                          18/60-18/79      6      18/190-18/199  17
Race    Modifier        18/80-18/99      7      18/200-18/209  18
-----------------        18/100-18/109    8      18/210-18/219  19
Human          0        18/110-18/119    9      18/220+        20
Half-Elf        3        18/120-18/129  10
Elf            6
Hobbit        18
Gnome          12
Dwarf          9
Half-Orc      -3
Half-Troll    -8
Dunadan        5
High-Elf      20

To calculate the probability of successfully activating a device, first
divide your character's device skill rating by 2 if your character is
currently confused. Then subtract the level of the wand, staff, or rod
to be activated, with a maximum subtrahend of 50. Call the resulting
number K (which may be negative).

If K is at least 3, then the chance of successfully activating the wand,
staff, or rod is (K-1) in K.

On the other hand, if K is less than 3, the probability of successfully
activating the device is very low yet nonzero; the probability of success
is 2 in 3*(4-K).
This makes:
18-8+(36*0,7)+3=38
Level of rod: 45
K=38-45=-7
Chances are: 2 in 33
So you were still quite unlucky.

Dragonboneman February 5, 2008 12:50

So I'm basically wasting my time with Rods of Teleport Other at the moment, and should stockpile them at home for later (at least until INT is maxed). Thanks, Mondkalb.

Mondkalb February 5, 2008 13:05

Go with wands of teleport other, they are only level 20 which makes the chances of activation for your char reasonable 17 in 18.

Dragonboneman February 5, 2008 13:32

The worry with using wands is not activating them, which works pretty well, but draining. That's why I'd like to eventually replace wands of TO with rods, as I am currently unable to melee anything which hits to drain charges.

Pete Mack February 5, 2008 21:59

Quote:

Originally Posted by Dragonboneman (Post 5298)
The worry with using wands is not activating them, which works pretty well, but draining. That's why I'd like to eventually replace wands of TO with rods, as I am currently unable to melee anything which hits to drain charges.

Zap drainers (with TO) before they get you. There's really no reason to fight highlevel 'W', etc. You only need 8 more device points to get a reasonable response from the rods, in any case--maybe 4 character levels, and a few potions of Intelligence.

Dragonboneman February 5, 2008 22:41

Put like that, it doesn't sound too bad. Expect a YASD post shortly. ;)

Dragonboneman February 7, 2008 10:14

Told you so. Death dump is on the ladder. Turns out I only had 17 INT, not 18. Not that it matters now of course.

d1sc0nnected February 7, 2008 19:40

Well yeah, you jinxed yourself. You shoulda knocked on wood. The RNG doesn't like being taunted.

Dragonboneman February 7, 2008 20:55

Naah. When I REALLY want to jinx myself I find Ringil. Kiss of death, that thing.


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