Yay finally someone to add on here.. I'm Ghaleon, please accept my join thingie =P.
I'm new too so I can't say. I HAVE heard though that wood/ice are bad elements for newbies unless you plan on cashing alot. Something about their "core" creatures being literally impossible to get without lucky rare egg drops, which you wont be getting many of unless you cash.
However, for the early portions of the game I learned you can farm dublits for a very powerful early game army. Dublits are the dudes that you can get from expert difficulty friday-event dungeon..soo.. you don't have much time left. The enemies inside are absolutely brutal unless you learn their gimmick, at which point they aren't too hard at all. In order to beat the dungeon you just need the following:
1: An ogre (they're fairly common drops in the 2nd tier of newbie elemental dungeons.. like you do a round of every element for dungeon sets.. then you do some kinda newbie chromatic dungeon set where the boss was multiples of the previous bosses of varying colours). You need this because their leader ability "you might survive a hit that may kill you" or something like that.. Contrary to its description, it's not random.. basically you have a 100% chance of surviving a fatal hit as long as your hp is over 70%.
2: A bunch of little weenie trash that have recovery as close as possible to, or higher than their HP ...So you can heal back up to 70% + easily enough. "sapphite, rublit, etc" are good, if you don't have any, carbuncles are prob your next best option.
3: another leader (friends' units count as leaders.. they have to be a friend though, not one of those random 3 strangers) with some kind of ability that might help you too. People talk about odin being good but I don't have one and I don't think you'll get one either for awhile. However, easier to get options include leaders that also help with healing like sirens or whatever. Or (what I use), someone with poison-all (lilith).
4: There are 2 kinds of enemies in expert, the little ghost dudes who are so weak and normal that you just kill them no matter how weak your group is.. and the bigger ones WHO WILL ONESHOT YOU (unless you're super geared.. like over 6666 hp I think it is). The big ones have a gajillion armor, and you'll hit them for 1 no matter what, so little weak dudes who are better at healing than fighting are ideal for those. Note that if there are more than one at once, and they both hit you at the same time, you die since the ogre thing procs between hits, not after all combine. Therefore, it's important to kill one that attacks at the same time as another asap (takes 2 turns minimum, 3+ if you screw up your orb-handling).
One time, I had 3 spawn at once all with an attack in 2 turns.. this was an OH SHIT moment.. that's what poison is for... it'll kill them in one hit cuz they only have 10 hp. If that never happens, save it for the boss, who is basically the same thing only stronger (they 1shot anyway so who cares), and with 50% more hp (and rainbow, yay).
Anyway, you'll get some dublits... and a mythlit if you're lucky (the boss). they are SUPER POWERED for us newbies, ESPECIALLY since they only cost 1!.. Aside from that, I'm too new to help, soz.
btw I just looked at bastet's stats...she seems really good/fun! I can't wait to friend you for her! I'll give you my level 20 gift thingie too.
edit: I thought the gift was just a random thingie, not a rare egg specifically. Supposedly with rare eggs you're best off waiting for "godfest" events. Did you want to wait or want me to send it now? I have no idea when the next one is...