Its cool.
Don't rely on Arachnid wakeup, its average at best and has no armor, most of the time the best thing to do is either block/backdash or use a fast move such as d1 if he isn't using armor. If he is constantly pressuring you, use pushblock and send him back. 3 normally beats all of his jumpins and ist 0 on block, so its safe on block and hit.
Also, doing 3 at the right time makes you immune to grabs, Ive been using this a lot lately vs command grabbers.
I assume you know how to avoid charge and punish and good zoning?