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Phosphates really don't matter at all. Mostly they are a way for pool stores to scare you into buying expensive chemicals.
With a vinyl liner there isn't any need for calcium.
Your TA is quite low. You should raise it some, especially if you are using trichlor tablets for chlorine. Of course, if you are using trichlor it is time to stop using it, because that is where your high CYA level is coming from.
Your CYA level is very high, which is probably why you can't maintain your chlorine level. When CYA is very high you need to add extremely large amounts of chlorine all at once to make any progress against algae. By far the best thing to do is to replace some water to get the CYA level down to a more reasonable level.