That is part of the thing. Why aren't all 5 min? Why do they differ? Especially when the shortest duration pacts are the weakest as well. Would be pretty odd if Ballad was 1 min, minne 4 min, and march 2 min. Just a set amount of duration would make much more sense.if you take the time to hit 420 skill(not hard) which pushes most of the buffs up to 5 minutes with a few at 3 and 4 minute durations.
Not to mention it would be nice if Summoner was a job for players before level 90 and with full endgame gear. A BRD for example functions already in the dunes at level 11ish. Sure BRD doesn't do much else than sing there, but a SMN hasn't even gotten buffs by then.
It is less about needing (nobody needs BRDs and CORs, but that doesn't make them help a lot in kill speed) but more about them having some use.Nothing in old world needs more than Hasteha and Diamond Storm. I can't thing of anything old world that's actually needs more intensive BP: Warding.
You did however remind me of one point I missed.
5. Wards should stack with other jobs buffs. It just is a shame that if you have a WHM or RDM, your hastega is less interesting (saves MP, but that is all it does). Your aerial armor does not stack with utsusemi and becomes obsolete. Your nocto shield does not stack with a SCH's AOE phalanx or RDMs phalanx II. If they could stack, you'd be a much better complement to a party since you'd boost your other mages buffs even further.