Easy levels, renown and money. (support and weapon proficiency if wanted)
For easy levels, money and renown, all you need to do is get loads of reeking boxes (sold in the shops at chapters 3 and 25 for 500 gold) and keep on summoning risen then fighting (grinding). Some should drop small bullions,(worth 1000 gold) which you can sell. It also helps to level up chrom, the avatar and everyone else level up. It should also give 10 renown for each summon. So if you do this correctly, you will be a walking pile o' cash.
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