Not from what I have gathered @super casino chips. I could use some advice here, I'm stuck on tower and campaign while I grind out 5 stars to make a 6 star, but current setup I'm not entirely sure of:
Gyazo - a3466fa860cbf395f114823457403d14.png currently using: Dragon Slayer, Norma, Lutz, Aidan, Faceless and Mirage, thinking on swapping something out for Starlight when its 100 for Dragon Slayer synergy? Shrug
The tower is something you're not going to beat, you're just going to slowly advance over time. As you get stronger, and stronger you'll tackle it. Campaign is the same way.
Event Raids, make sure you do all 3 of them. I'd not buy any extras, but once you get the top end one for the puzzle pieces (I think at level 165 so its a LONG way away) then it's worth buying. But until then, forge ahead a little at a time.
Also, make sure you update your gem as you can. Fusion events give a lot of dust, which is extremely helpful. I find that Crit/Crit damage is the best for most heroes, others ATK/ATK % works better. It depends, but all my heroes have 3 types of gems only, Crit/Crit damage, ATK/ATK %, and HP/HP%.
You could try to make do with an aura, but you don't have anything good light wise other than fegan, the 4 star. The rainbow aura (Fegan, DF, Norma, Faceless, Aidan, DS or Lutz) might help, but I doubt it. Sometimes you're just going to be stuck and have to do the daily grind until you can make some new 5 stars from fusion (though for F2P or low payers, I'd recommend not doing any fusions except during the event).
The tower levels get ridiculous though. I'm stuck on 479, which is really hard, but I'm way further than anyone else on my server (And I think the best in the game on android, I think me and one other are stuck on 479, and on iOS there's this guy who's spent god knows how much and he's on 485). There are many "stuck" levels, which you can usually tell looking at the list of top players in tower, there are several stuck on the same level, etc.