Yeah, it's annoying but if you are tough enough, best to ride through it. If you dont need any additional gears, I would recommend investing in an Osiris card. It lets you use agi up and also level 1 or 2 Warp Portal. That way you can counter Decrease Agi AND not have to ask for ports again hehe.
Hmm wonder if one has sleips and unequip and requip them, would they counter decrease agi? Since when you equip Sleips it says speed has been increased, same message you get with agi up