Here's my latest pocket world's params, which had no less than 10 towers :-
Click 'c' for all region rejects notifications.
[WORLD_GEN]
[TITLE:JJ]
[SEED:Qb5nHqAbs7uKOHLbuN7o]
[HISTORY_SEED:eXQrLd7fU7UGQMgBSJJh]
[NAME_SEED:6OY0VAnzORss6lDny4HN]
[CREATURE_SEED:2Y2bg9wOIH8TcGgGdMeh]
[DIM:17:17]
[EMBARK_POINTS:1274]
[END_YEAR:500]
[BEAST_END_YEAR:200:80]
[REVEAL_ALL_HISTORY:1]
[CULL_HISTORICAL_FIGURES:0]
[ELEVATION:1:400:52:52]
[RAINFALL:0:100:26:26]
[TEMPERATURE:25:75:26:26]
[DRAINAGE:0:100:26:26]
[VOLCANISM:0:100:26:26]
[SAVAGERY:0:100:26:26]
[ELEVATION_FREQUENCY:1:1:1:1:1:1]
[RAIN_FREQUENCY:1:1:1:1:1:1]
[DRAINAGE_FREQUENCY:1:1:1:1:1:1]
[TEMPERATURE_FREQUENCY:1:1:1:1:1:1]
[SAVAGERY_FREQUENCY:1:1:1:1:1:1]
[VOLCANISM_FREQUENCY:1:1:1:1:1:1]
[MINERAL_SCARCITY:2500]
[MEGABEAST_CAP:10]
[SEMIMEGABEAST_CAP:20]
[TITAN_NUMBER:10]
[TITAN_ATTACK_TRIGGER:80:0:100000]
[DEMON_NUMBER:40]
[NIGHT_TROLL_NUMBER:20]
[BOGEYMAN_NUMBER:20]
[VAMPIRE_NUMBER:20]
[WEREBEAST_NUMBER:20]
[SECRET_NUMBER:5]
[REGIONAL_INTERACTION_NUMBER:40]
[DISTURBANCE_INTERACTION_NUMBER:40]
[EVIL_CLOUD_NUMBER:20]
[EVIL_RAIN_NUMBER:20]
[GOOD_SQ_COUNTS:1:1:1]
[EVIL_SQ_COUNTS:1:1:1]
[PEAK_NUMBER_MIN:1]
[PARTIAL_OCEAN_EDGE_MIN:1]
[COMPLETE_OCEAN_EDGE_MIN:0]
[VOLCANO_MIN:30]
[REGION_COUNTS:SWAMP:0:0:0]
[REGION_COUNTS:DESERT:0:0:0]
[REGION_COUNTS:FOREST:0:0:0]
[REGION_COUNTS:MOUNTAINS:0:0:0]
[REGION_COUNTS:OCEAN:0:0:0]
[REGION_COUNTS:GLACIER:0:0:0]
[REGION_COUNTS:TUNDRA:0:0:0]
[REGION_COUNTS:GRASSLAND:0:0:0]
[REGION_COUNTS:HILLS:0:0:0]
[EROSION_CYCLE_COUNT:250]
[RIVER_MINS:20:20]
[PERIODICALLY_ERODE_EXTREMES:1]
[OROGRAPHIC_PRECIPITATION:1]
[SUBREGION_MAX:2750]
[CAVERN_LAYER_COUNT:3]
[CAVERN_LAYER_OPENNESS_MIN:0]
[CAVERN_LAYER_OPENNESS_MAX:100]
[CAVERN_LAYER_PASSAGE_DENSITY_MIN:0]
[CAVERN_LAYER_PASSAGE_DENSITY_MAX:100]
[CAVERN_LAYER_WATER_MIN:0]
[CAVERN_LAYER_WATER_MAX:100]
[HAVE_BOTTOM_LAYER_1:1]
[HAVE_BOTTOM_LAYER_2:1]
[LEVELS_ABOVE_GROUND:100]
[LEVELS_ABOVE_LAYER_1:100]
[LEVELS_ABOVE_LAYER_2:100]
[LEVELS_ABOVE_LAYER_3:100]
[LEVELS_ABOVE_LAYER_4:100]
[LEVELS_ABOVE_LAYER_5:100]
[LEVELS_AT_BOTTOM:100]
[CAVE_MIN_SIZE:5]
[CAVE_MAX_SIZE:50]
[MOUNTAIN_CAVE_MIN:10]
[NON_MOUNTAIN_CAVE_MIN:20]
[ALL_CAVES_VISIBLE:1]
[SHOW_EMBARK_TUNNEL:2]
[TOTAL_CIV_NUMBER:50]
[TOTAL_CIV_POPULATION:15000]
[SITE_CAP:18]
[PLAYABLE_CIVILIZATION_REQUIRED:1]
[ELEVATION_RANGES:36:72:36]
[RAIN_RANGES:0:0:0]
[DRAINAGE_RANGES:0:0:0]
[SAVAGERY_RANGES:0:0:0]
[VOLCANISM_RANGES:0:0:0]
What I'm looking for now is if anyone knows how to make elves and goblins,etc learn the secrets? I can't find any particular tags which are limited to dwarves and humans.
EDIT: umm, just remembered i made a few minor raw mods like taking out aquifers, don't know how much this will affect the worldgen.