Basically, my question is: How would you deal with an aggro metagame with this deck, or would you just not take it there? Picture decks like Affinity, Stompy, Threshold, R/G, Sligh plus B/W in many forms, and add one of each U/W control, Oath, Dragon to the list. I know the solution to that metagame is Storm combo, but for the sake of the argument, which adjustments would you make to your deck, or none at all?
If I understand you correctly, your main concern is targeted removal, (Swords, Lightning Bolt, Bounce) because it both hampers your ability to gain control by removing your draw engine, and your ability to win (aka. not loose aka. Paltz).
Some tech that has been tested in early Welder based decks is Lightning Greaves. In theory it is perfect for this deck, because it can protect both the Confidant and the Angel. It has two huge problems though, and both are related to speed:
1) Equipping is sorcery speed, so your creatures can be taken out by most removal in response.
2) The mana cost. You already have a lot of two-mana cards competing for your resources in the early turns. Confidant itself, Mana Leak, and Mana Drain.
Also, if you succeed in protecting the Confidant with Greaves in the early and mid game, your opponent is likely to have a huge stockpile of removal in hand for the Angel when she enters.
Another option is to board in (or leave in) Duress in these matches. You would be able to snag a removal spell now and then, but it will too often force you to delay the Confidant for a round, or simply "miss" when you see a hand consisting of creatures and lands.
A third option is to add a few more copies of Misdirection. This should work wonders against targeted removal in creature based decks, as they will likely have an "Innocent bystander" on the board to direct the removal at. There are more efficient (in respect to Card Advantage) alternatives to Misdirection, (Divert, Intervene, Meddle etc.) but these are probably too narrow.
All in all, Misdirection seems like the best solution to me.
/Jan