If you build some amber light (elemental WS kills) you can get some decent NPCable items from gold chests; Highlands is particularly good for that. Or, as Wint said, go to Scars areas and get AF3 feet from chests.
You can also build a cruor chain by killing enemies of different types back-to-back (i.e. not the same mob name twice in a row). While cruor can't be used to generate gil effectively with the last update, as a returning player, you may be needing a decent amount for items and upgrades at this point as it is. If you're killing solo anyway, it doesn't hurt too much to set yourself up for alternating mob types, for example, the two types of crabs in Mis. Coast.
On the up end as rdm, you can pretty effectively generate all relevant lights (pearl, azure, amber) while you do this.
"We are Dragoons, and to make short work of foppish cavalry is our bread and butter."
-Bob Shaftoe, The System of the World