It seems that when I successfully cast Freeze or Weakness on a monster and then kill the monster i get a few thousand points. I tried it on a few monsters to be sure. I managed to get over 28000 Exp from a rat.

Here is the log of the system messages when i killed the rat using only Freeze

(00:57:09) >You start casting spell Freeze
(00:57:09) >Your spell (Freeze) has been interrupted!
(00:57:16) >You start casting spell Freeze
(00:57:16) >Rat attacks you but your hands blocks it.
(00:57:18) >Rat hits Wirrar Oesalor, but bounces off the armor!
(00:57:18) >Rat attacks you but your arms blocks it.
(00:57:20) >Rat hits Wirrar Oesalor, but bounces off the armor!
(00:57:20) >Rat attacks you but misses.
(00:57:21) >You freeze the air around your target.
(00:57:22) >Rat hits Wirrar Oesalor, but bounces off the armor!
(00:57:22) >Rat hits you on the arms but your armor protects you!
(00:57:24) >Rat attacks Wirrar Oesalor but they are blocked.
(00:57:24) >Rat attacks you but your feet blocks it.
(00:57:25) >Wirrar Oesalor hits Rat for 5.58 damage!
(00:57:26) >Rat hits Wirrar Oesalor, but bounces off the armor!
(00:57:26) >Rat hits you on the feet but your armor protects you!
(00:57:27) >You start casting spell Freeze
(00:57:28) >Wirrar Oesalor hits Rat for 5.64 damage!
(00:57:28) >Rat hits Wirrar Oesalor, but bounces off the armor!
(00:57:28) >Rat attacks you but your legs blocks it.
(00:57:30) >Wirrar Oesalor hits Rat for 7.61 damage!
(00:57:30) >Rat attacks Wirrar Oesalor but they are blocked.
(00:57:30) >Rat hits you on the hands but your armor protects you!
(00:57:32) >You freeze the air around your target.
(00:57:32) >Wirrar Oesalor hits Rat for 7.09 damage!
(00:57:33) >Rat attacks Wirrar Oesalor but Wirrar Oesalor dodges.
(00:57:33) >Rat attacks you but your arms blocks it.
(00:57:35) >You start casting spell Freeze
(00:57:35) >Rat hits Wirrar Oesalor, but bounces off the armor!
(00:57:35) >Rat attacks you but your head blocks it.
(00:57:35) >Wirrar Oesalor hits Rat for 7.10 damage!
(00:57:35) >Rat has been killed by Wirrar Oesalor!
(00:57:37) >Rat hits you on the arms but your armor protects you!
(00:57:39) >Rat hits you on the head but your armor protects you!
(00:57:40) >You freeze the air around your target.
(00:57:41) >Rat hits you on the arms but your armor protects you!
(00:57:43) >Rat hits you on the legs but your armor protects you!
(00:57:43) >You start casting spell Freeze
(00:57:45) >Rat attacks you but your legs blocks it.
(00:57:47) >Rat hits you on the feet but your armor protects you!
(00:57:48) >You freeze the air around your target.
(00:57:49) >Rat hits you on the torso but your armor protects you!
(00:57:51) >You start casting spell Freeze
(00:57:51) >Rat attacks you but your legs blocks it.
(00:57:53) >Rat hits you on the hands but your armor protects you!
(00:57:55) >Rat hits you on the arms but your armor protects you!
(00:57:56) >You freeze the air around your target.
(00:57:57) >Rat hits you on the feet but your armor protects you!
(00:57:59) >You start casting spell Freeze
(00:57:59) >Rat attacks you but your arms blocks it.
(00:58:01) >Rat attacks you but your torso blocks it.
(00:58:02) >Wirrar Oesalor hits Gobble for 6.11 damage!
(00:58:04) >Gobble hits Wirrar Oesalor for 7.14 damage!
(00:58:04) >Rat attacks you but misses.
(00:58:04) >You freeze the air around your target.
(00:58:05) >Wirrar Oesalor hits Gobble for 5.94 damage!
(00:58:06) >Gobble attacks Wirrar Oesalor but misses.
(00:58:06) >Rat attacks you but your legs blocks it.
(00:58:07) >Wirrar Oesalor attacks Gobble but they are blocked.
(00:58:08) >Gobble hits Wirrar Oesalor for 7.23 damage!
(00:58:08) >Rat attacks you but your torso blocks it.
(00:58:08) >You start casting spell Freeze
(00:58:09) >Wirrar Oesalor attacks Gobble but they are blocked.
(00:58:10) >Gobble hits Wirrar Oesalor for 6.71 damage!
(00:58:10) >Rat attacks you but your legs blocks it.
(00:58:12) >Wirrar Oesalor hits Gobble for 6.80 damage!
(00:58:12) >Gobble hits Wirrar Oesalor for 6.44 damage!
(00:58:12) >Rat attacks you but you dodge.
(00:58:14) >You freeze the air around your target.
(00:58:14) >Gobble hits Wirrar Oesalor for 6.78 damage!
(00:58:14) >Rat hits you on the feet but your armor protects you!
(00:58:14) >Wirrar Oesalor hits Gobble for 7.38 damage!
(00:58:16) >Gobble hits Wirrar Oesalor for 6.53 damage!
(00:58:16) >Rat attacks you but you dodge.
(00:58:16) >Wirrar Oesalor hits Gobble for 7.43 damage!
(00:58:17) >You start casting spell Freeze
(00:58:18) >Gobble attacks Wirrar Oesalor but they are blocked.
(00:58:18) >Rat attacks you but your legs blocks it.
(00:58:19) >You gained 28191 experience points.
(00:58:19) >You gained 141 progression points.


Here is using Weakness along with some swords on Carkarass

01:23:19) >You start casting spell Weakness
(01:23:28) >You failed to cast spell Weakness
(01:23:30) >You start casting spell Weakness
(01:23:38) >You instill weakness and illness into your enemy.
(01:23:41) >Carkarass hits you on the legs for 5.53 damage!
(01:23:42) >You start a defensive attack.
(01:23:43) >Carkarass attacks you but your arms blocks it.
(01:23:44) >You hit Carkarass on the feet for 9.56 damage!
(01:23:44) >You hit Carkarass on the hands for 8.29 damage!
(01:23:45) >Carkarass hits you on the head for 5.80 damage!
(01:23:46) >You hit Carkarass on the arms for 10.50 damage!
(01:23:46) >You attack Carkarass but missed the legs.
(01:23:47) >Carkarass attacks you but your legs blocks it.
(01:23:49) >You hit Carkarass on the head for 10.42 damage!
(01:23:49) >You hit Carkarass on the arms for 10.42 damage!
(01:23:49) >Carkarass hits you on the feet for 5.76 damage!
(01:23:51) >You hit Carkarass on the hands for 10.72 damage!
(01:23:51) >You hit Carkarass on the legs for 10.45 damage!
(01:23:53) >You hit Carkarass on the arms for 9.24 damage!
(01:23:53) >You hit Carkarass on the torso for 8.92 damage!
(01:23:53) >Carkarass attacks you but your arms blocks it.
(01:23:54) >Carkarass attacks you but your legs blocks it.
(01:23:55) >You hit Carkarass on the head for 11.52 damage!
(01:23:55) >You have killed Carkarass!
(01:23:55) >You gained 2082 experience points.
(01:23:55) >You gained 11 progression points.


I don\'t want to cheat and now i have all these Progression points from trying this on different monsters


Edit   I was using 0% spell power the whole time