1072 runs is ridiculous

in a good way.
you could re-allocate a larger portion of resources to pitching. that may not mean an 'extra' arm... it may mean an upgrade of an exisisting arm or 2. even i that park you can at least be average... i'd shoot for top-half at least... never done it, so being conservative in the guessing. i don't think top5 or better is unreasonable, either.
getting high control pitchers is probably even that much more important in a park like coors field. low whip vs high whip pitchers - relative to good results. anythign that reduces baserunners for the inevitablly high HR total. expect a bump from any FA's track record, for sure... maybe even a bit more volatility in yearly results for SP and RP.