Juhani or canderous ?

Are you just looking for an easy gear to get Malak, or do you actually want to build an OR team? I had a slightly easier time with Juhani in the event as a damage sponge, although the DS side is relatively easy anyway. Canderous is more necessary for an OR team, however, and is usually the one picked for the event. That being said, having Juhani as a second tank in the team is excellent, so it's worthwhile to do both.

If you don't care about any of that and just want to spend the least gear necessary, just look at their total gear lists on swgoh.gg and pick whichever looks easier.