If you really must use one in combat then take a good pike and use that while mounted instead. You can still use the webs but can do considerably more damage. (And don't put any levels into melee, a high level spider still only does about 20 damage per bite. Useless.)
After the creatures replaced this many considered it useless now.to re-new this it would be nice if it had a full power climb,like megalania,maybe hav it be able to spin webs to trap creatures no-larger than a carno,to top it all off hav it spin webs around your base that produce silk and when wild dinos try to attack they get caught in the web.
Don’t underestimate these things. A dilo and an araneo set on turret mode completely blinds any would be attacker. Pair that with a raptor for the pin, and an onyc for megarabies and the armor wreck, that player won’t know what hit them.