Hello! I am also very new splinterlands, however in my experience I have a couple of things to note.
1.) I would not say that there is a combat triangle per say. However, certain tricks can definitely help you win battles. For example, when going against an earth splinter, the void ability (in unicorn mustang and bone golem) can be very useful. Especially in starter decks where earth splinters primarily use magic attacks
2.) I have been playing with no money other than the spellbook. Progress can be slow and frustrating but you can still have fun and play the game.
3.) I do not know as I don't rent cards.
I hope this helps!
Thanks for the reply.
when i went through the tutorial it said that because the opponent is using Death i should use fire because Death is powerful but slow . From this there im taking it there must be some sort of elemental weaknesses/strengths to each element.
Also, you say that to use void against Earth is good , but how do you know they will chose earth, of course you have last 5 fights shown but unless they have clear preferance for an element, choosing which style is still a struggle for me.
Thanks again for reply and any further advice.