two waves in spire you'll get at first floor only at the doors. These waves are normally can be done by good army and also a phenix. If you dont have a phenix, it will be difficult to get through the 1st BigBoss.
On 2nd floor and also on 3rd floor there are always two waves, sometimes there a 3 waves. Thats normal.
And fighting there without expiring boost building and a phenix is very very difficult.
So, stay in your chapter, increase the fight wonders, build up a phenix and collect troop boosters. Then you can even try to fight the spire to the top.