Hi James
never fish Oman, but will love to one day, so Can't really comment on that but will suggest you what I think. I myself is not a very big guy but will not go on any trip with out a heavy rod. You never know when you need one.
MH80 is a very good choice, you pretty much cover a lot of bases with these rod plus your coral viper.
You are concern with your size, you shouldn't be. Is how you use the tools that makes the difference.
I love casting lures around 150-230 gm, so my choice of weapon are Ultimo 79h perfect with poppers up to 160gm and stick bait to 200gm. The other would be hots 75xxh for poppers up to 230gm but both these rods are awesome on 180gm sinking stick baits.
If you a little concern, maybe you should op for a rod that's more forgiving like race point 250. I believe garapro shop have one on special.
Maybe you should toughen up and start doing some work out.