I think your tips would be better off if they are addressed to the OP @Ba3rman, but I’m glad you are trying to help out. As I already have 90% of my camp at level 20 on my main account, those are irrelevant for me by now.
I agree that TC 2 is expensive, but I like the fact I have my feeder heroes sooner than later when I spend time on my alt account. I also decided to have this setup in order to have ‘one of each’ while leveling my SH up to 20. It’s a personal preference, as I do not mind growing slow on this second account.
For the OP I think this is very important:
Once you start the game, I would advise you to spend gems on summoning heroes until you atleast have a rainbow 3* team. Elemental summons will help you out to achieve a rainbow team faster. After that save the gems for x10 summons during Events or Atlantis portals or spend them on extra hero capacity or ascension material offers (if you need them).
This is also true. Find an alliance, which can help you obtain resources more easily. This means the alliance should be active and not be half-empty. Work your way towards SH20 asap, as training camp level 20 will give you guaranteed 3* with a chance on 4* and 5* heroes.
I do not agree with getting your forge to level 18 ASAP. Mine has been on level 13 for ages after I reached SH20. Being able to produce Dragon Banners and everything from lower leveled production stages was sufficient enough to tackle every quest and event. Instead, work towards having multiple 3* and 4* heroes of each color. You will be able to finish special quests and events much easier with a variety of heroes, thanks to having opportunities to adjust your team to the weakness of these events and quests.
I do agree with this. It’s pretty much a waste to use them on something else (titan’s later on).