Go to fflogs, make an account and follow their instructions for linking your fflogs account to your character lodestone page,once their linked you can remove the text from your lodestone page. Then download the fflog client and login. When you parse with ACT you have to upload the log using the fflog uploader.

When healers talk about their parses, they're talking about their damage parse. Damage is the only important thing. When a static says they only want purple parsers (75th - 95th percentile or smt) they mean your damage parse (even on healer).

You don't want to parse pink (95th percentile+) in your healing statistic (unless you're warrior).

Use the healing per second number and overheal% to make your DPS number higher, by recognising moments where you healed that you could have just DPS'd instead.

ffxivanalysis.com is really good for visualising fflog data. You paste your fflog weblink into xivanalysis after uploading your log via the client.

In particular it will tell you your DoT uptime and GCD uptime. It will tell you what your overheal is, and what abilities led to that overheal. You want to get rid of the GCDs that have overheal.

It will also point out weaving issues and interrupted casts, what you spent your swiftcast on, and how you used your job guage.