I'm going to replace some facia boards. I think all boards are common pine (hard to tell since they are painted). My facia boards are 1x6 with a 1x2 drip cap near top. I was thinking of replacing the 1x6 with hardiplank and the 1x2 w/cedar. I was not able to find 1x2 in hardiplank. One repair guy told me that it probably was better to go with all cedar. When I mentioned to him about gutters, he said the screws would strip putting them into the hardiplank but someone else said I could predrill holes in hardiplank so I'm a bit confused. He also said that if the gutters were hung instead of screwed/nailed there wouldn't be any facia boards rotting (my main concern).
Bottom line: Assuming I'm installing gutters (hung or screwed), is it a good/bad idea to mix the 1x6 hardiplank facia boards with a 1x2 cedar drip caps assuming I'm trying to prevent wood rot? Whatever I use, they will be painted to match the house in color. Advice please.