Loot difference for different star titans

@Luckyclover666 In short, all of the A+ through C loot tiers on an 8* are two higher than a 6*. So a top spot A+ on a 6* is equivalent to a B on an 8*, and both get the same loot.

This guide explains in full how Titan loot tiers work:

(@Kerridoc @Rook @Coppersky Possible Merge of Topic)