I found when I used to play, alot of people used to really suck at their priorities. Store TP can be better than haste. A 7 hit build with some extra haste isn't as good as a 6 hit build with no haste.
http://wiki.ffxiclopedia.org/wiki/Samurai:_Ultimate_Guide_by_Gregedor#Store_TP
To achieve a 6 hit build (which is basically the TP from your weapon skill + 5 more hits to reach 100 tp, or 6 hits starting from 0 tp), you need 45 store tp, including the store TP from your traits. Once you have 45 store tp, you can then focus on haste gear.
http://wiki.ffxiclopedia.org/wiki/Samurai:_Ultimate_Guide_by_Gregedor#Store_TP
To achieve a 6 hit build (which is basically the TP from your weapon skill + 5 more hits to reach 100 tp, or 6 hits starting from 0 tp), you need 45 store tp, including the store TP from your traits. Once you have 45 store tp, you can then focus on haste gear.