Couple newbie questions first though 
1.) Tank is a 90gallon, mostly FOWLR with some mushrooms that hitchhiked which I kind of like - considering getting more, brighter, mushrooms and maybe some zoa or other super-easy coral that require little-to-no attention from me
. Will the Flame Angel eat these corals? My One Spot Fox Face seems to be leaving them alone without issue.
2.) How hardy are Flame Angels? I generally try to only keep "easy" fish that don't require too much of my time/attention. Don't get me wrong; making sure there's always nori/seaweed on a clip is not something I consider hard, neither is feeding twice per day
3.) How aggressive will a Flame Angel be towards current stock and any new arrivals? Current stock is Ocellaris Clownfishes, 2x Cleaner Shrimp, CUC (mostly snails about 50-55 all together and 3 hermits too), Diamond Goby, Blue Neon Cleaner Goby, (male) Red Head Solon Fairy Wrasse and a One Spot Fox Face Rabbitfish. I LOVE my cleaner goby but they have a very short lifespan of 1-2 years unfortunately so I'll be adding another each time one's life becomes "full" so-to-speak, so being able to add additional fish is important.
4.) Currently I put nori/seaweed on a clip about once or twice per day for my foxface (my wrasse eats it too for some reason... Really can't figure that one out ?). In the morning I feed some Cyclop Eeze and about a 3rd cube of "Mega Marine Algae" (it's a mix of spirulina, squid and some other stuff). At night I feed about one cube of frozen Mysis and maybe throw some pellets/flakes in there if I feel the fish are still hungry. Would continuing the feedings the way I'm doing them be sufficient with the addition of a Flame Angel? Should I add a second clip for seaweed since I'll have two grazers in the tank (plus my wrasse that apparently likes veggies
)? Should I get more variety of frozen foods?
Thanks guys!!!

1.) Tank is a 90gallon, mostly FOWLR with some mushrooms that hitchhiked which I kind of like - considering getting more, brighter, mushrooms and maybe some zoa or other super-easy coral that require little-to-no attention from me

2.) How hardy are Flame Angels? I generally try to only keep "easy" fish that don't require too much of my time/attention. Don't get me wrong; making sure there's always nori/seaweed on a clip is not something I consider hard, neither is feeding twice per day

3.) How aggressive will a Flame Angel be towards current stock and any new arrivals? Current stock is Ocellaris Clownfishes, 2x Cleaner Shrimp, CUC (mostly snails about 50-55 all together and 3 hermits too), Diamond Goby, Blue Neon Cleaner Goby, (male) Red Head Solon Fairy Wrasse and a One Spot Fox Face Rabbitfish. I LOVE my cleaner goby but they have a very short lifespan of 1-2 years unfortunately so I'll be adding another each time one's life becomes "full" so-to-speak, so being able to add additional fish is important.
4.) Currently I put nori/seaweed on a clip about once or twice per day for my foxface (my wrasse eats it too for some reason... Really can't figure that one out ?). In the morning I feed some Cyclop Eeze and about a 3rd cube of "Mega Marine Algae" (it's a mix of spirulina, squid and some other stuff). At night I feed about one cube of frozen Mysis and maybe throw some pellets/flakes in there if I feel the fish are still hungry. Would continuing the feedings the way I'm doing them be sufficient with the addition of a Flame Angel? Should I add a second clip for seaweed since I'll have two grazers in the tank (plus my wrasse that apparently likes veggies

Thanks guys!!!