I'm not a samurai at all. I'm a bst.
I've been testing spur (pet store tp) and I noticed wiki still only shows tier 4 store tp for samurai at level 70. Did anyone confirm you get store tp tier 5 at level 90? It seems to fit the pattern..
The reason I mention is because it looks like bsts can give our pets store tp tier 5 (30% increase), I would expect sam to have it.