Elder-Basilisk said:
Haste, however, IMO ought to be assumed by high levels. It's a pretty common spell, and is available through boots of speed, weapons of speed, and a odd effects like bracers of the quick strike and the valiant fury spell.
I don't know about that. Haste is an arcane caster only spell, hence, it requires a Wizard willing to use up several slots a day taking it, or a Sorcerer/Bard willing to give up a known spell in order to boost Fighter types.
Not all groups have that. In our group, we do not have an arcane caster at all.
Plus, you keep mentioning Boots of Speed and Weapons of Speed.
Boots of Speed are 10 rounds per day. Hardly game breaking to get full round attacks with that. Characters with Boots of Speed could turn them on during rounds where they get full round attacks and off on rounds where they do not get full round attacks. With 3 to 4 encounters per day as the guideline, the PsyWar/Fighter does not really get that many additional attacks per day due to his Boots of Speed that the straight Fighter cannot also get by using them intelligently. If you go this route, there is no real gain due to Haste here.
Weapons of Speed are +3. If you play close to the wealth by level and no item worth more what you earned within the last level, the earliest levels at which a character could get these very potent weapons are:
+1 Weapon of Speed: 32000 GP 14th
+2 Weapon of Speed: 50000 GP 15th
+3 Weapon of Speed: 72000 GP 17th
+4 Weapon of Speed: 98000 GP 18th
+5 Weapon of Speed: 128000 GP 19th
So, if your PsyWar/Fighter is using a +1 Weapon of Speed at 14th level and the straight Fighter decides to just go with the +4 Weapon, the straight Fighter will in the long run still do similar damage. A +5 Weapon of Speed versus a same cost +5 Holy Thundering Weapon, the Weapon of Speed will probably average less damage.
And yes, there are other ways to get Haste effects, but the bottom line is that this is a specific tactic that is good, but hardly game breaking.
And any DM worth his salt should have arcane enemies occasionally cast Slow to dispel it, especially enemies that have fought the PCs before and have seen their tactics in action.