I didn't say that crusader was better you know ^^
For my part both are really different, depending from other cards you play and from the metagame you expect.
Archangel : works good if you earth cards are shrieker and you expect a lot of fire stall and other deck with CC. as the AI is rather stupid if he has a lightning in hand he will play it on your archangel en then you'll manage to heal him next turn. he his also very efficient vs fire shield, RoF and any form of poison. Moreover a 7/7 strike hard, match well with epinephrine and his very hard to kill in the early game.
Crusader : Better if your earth card is pulvy obv. Still if you are running some SoSe it can be good too and you can find stupid combo that allow you to win (yeah I already a solar shield, then fractaled crusader and made them all endow the jade staff and won thanks to this :p) also he has lot of synergy with most of the weapon and TU helps a lot. for example your opponen play a vampire stiletto ? you endow it then epinephrine if you have it and TU it'll give you a 30 HP heal each turn. In brief crusader is maybe more fun but also slower and more vulnerable early game (lightning, rage pot and lobo neutralize him early game). still it looks better if yo expect lot of monoaether or some oracle bow. My current deck use crusader.