Do the 4 afk mini games have rewards or is it just Tempoross that has drops? (Context, I have done 25 hours of wintertodt, 10 hours of herbiboar and 15 hours of the mining boss did not get anything other then the afk tokens)
Fishing & Tempoross should give you caskets, Firemaking & Wintertodt should give you crates. The 2 others I think are just xp and tokens or you need a certain level.
How do I get the mage training arena gear?
Do I need to buy it with bonds/votes/blood money or can I do the mini games to get it all? If you go to mage arena and kill the elf things they drop mage book/master want (1/80) and full infinity gear (1/80) (imbued god capes, god capes, voting/donating)

Is the ring of wealth scroll an obtainable drop? If so Does the ring of wealth (I) have any effect on the clue scroll drop rates? Not sure about imbue but ring of wealth should give some added bonuses.

What are the best ways to obtain clue scrolls assuming I have the relics unlocked for skilling and pvm? Depends which sort of client you want, dagganoths for hard clues, cursed barrows in the wild... their keys gave me loads of clues. Basically as you train slayer you should get clues. Tournament is on a set timer in the quest tab you get points which you can buy a variety of items including clues.

Can monsters like the kraken, abyssal demons ect be killed off task for the tentical/whips ect? If you're a normal player (non iron) you may kill off task.

Hope this helps, any additional questions feel free to ask.