What you need is lots of IIR (e.g. a Wondertrap setup), a ton of whetstones and scraps, and 5 five quicksilver flasks. And best set aside some stash tabs for the normal, magic and rare gear. If all that is no problem to you, you can get really a lot of alchs in a relatively short time.
That's a good idea. Another way is as a by-product of chancing for uniques; 20q, chance, then save sets to vendor on the fails (in my experience all of them lol).
For me, I pick up white Gavels from the ground and vendors. 4 Whetstones for 20%, then Chance. If blue, vendor with low level map for Chisel. If yellow, keep it and when I get another blue and white it's an Alchemy (20% normal Gavel + 20% magic Gavel + 20% rare Gavel = 1 alchemy). This only takes up 12 squares in your map stash tab.
Ideally I chance a Mjolner but I haven't yet.
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There is nothing wrong with farming Alts if everything else fails. Pick a boss at a level you are comfortable with and you can get to fast (cruel/merciless Hillock is seriously underrated for this) and whack away :-D.
Merciless Tidal Island is also a great spot (for now, who knows after 2.0 with the progression changes) since every rare from Hailraike can be used for the Chaos recipe.
If you prefer a larger Zone like the Ledge, (or in general, actually) I would invest in a portal gem. Serious leap in convenience and you have all those extra Portal scrolls to turn into Wisdoms. :-)
Taking advantage of the Master's rates also helps speeding up getting significant/tradeable amounts of Orbs.
And I would try Trade chat, you can get some really good deals there since for a lot of people speed > best rate on the server.
Good luck :-)