If it is the official amount of buffs then we have a "subjetive unbalance" :
Besides this buff overiding issue, wich mainly affects "warriors", mages do not need self "quick" buffs and their MP pots are instant, HP pots are expensive and slow. If I remember correctly, the "official" L2 from years ago, MP and HP pots (both) regenerated stats slowly, so a mage had to run and can't spam spells like a boss forever. So, we should wait if this is affecting the "warrior" gameplay by taking a quick look at giran, if in a month... 75% of the server are mages then this should be adressed, voted or disucused!
Or the solution is the thing I saw today at antharas: a mage running with 7 "backpack" accounts or so xD, until higher level and equipment were "warriors" can be self sufficient without 3 o 4 buffs to have room for self- 10s buffs :-D
Don't get me wrong, I'm new in L2Dex and i'm enjoying the server, it looks very promising, lots of people! I'm giving my point of view, for the moment, i'm leveling a DA... Gonna level a mage today to farm a bit and have the experience to talk here.