I'm looking into high swim builds because swimming super fast is fun.
Class: Druid 13 at least for Water elemental (+20 Swim) and Merfolk's Blessing
Sorcerer 1 for Water Savant tier 1 enhancement Fluidity (+6 Swim)
Race: Human for Athletic enhancement (+3 Swim) and extra feat for viability outside of water
4 skill tome
3 extra Epic Skills feats at 21,24,27
6 Exceptional bonus to Strength skills
20 Water elemental
3 Skill focus feat
2 Athletic feat
3 Athletic human enhancement
2 Good Luck augment
6 Fluidity water savant enhancement
15 Item (up to +20 with Aquatic bracers or Skullduggery belt)
8 Strength modifier (26 STR)
20 (more?) Merfolk's Blessing
130 total sustainable
It looks like someone with better gear (EE aquatic bracers, more STR, temporary bonuses like potions/boosts) could reach 150-160.
Did I miss any skill bonus sources?
Also, what are good swimming locations?
Stormreach Harbor has the ocean, Eveningstar has the river with strong current, there is a lake in Stormhorns and Vale ... what else?