At first I wanted to say, just get another 10 icon constant, such as anoter
Staff of Righteous Fury;
Scuzzys Comb; or
Ramtors Spellbook or maybe save up to the 775k needed for a
Honey Potion
But then I saw than you have higher defense than Str, so I'm guessing you're in a league or guild where that benefits you (such as the current highly flawed NCW league system), so I'm going to recommend some shields and dual duties.
Your current set blocks everything but fire, and the best fire blocking option in your budget is probably the lowly
Scarab Ring, which is regarded as a beginner weapon by people who forget that it comes out even against many 9 and 11 icon offensive weapons. The other option for fire defense is trying to find a
Greater Fire Potion, but at r99 that's not going to be worth the cost.
You have a Pteri, so you resist 40% of Air. You have a
Golden Compass so you can effectively defend dark. So why are you using
Mystical White Cloak? A
Sword of the Dead will block more light and comes with an attack attached. Unless you're going up against a lot of people with
Air Faerie Crown, I'd recommend dropping the MWC. If you are really attached to the Light/Dark defense in one item,
Pteri Egg Amulet is another option to consider, but probably not the best one.
Furthermore, you have a higher Def than Str, so unless you are very good at predicting when your opponent is going to bomb, you're probably better off with another shield or defensive dual duty that you are with
Downsize!. Normally I'd recommend
Cloudy Wand of Storms;
Frozen Wand of Crystals and/or
Golden Compass, but you already have a compass and your Leaf Shield covers the icons the wands could block, so instead you should probably consider
Thief Dagger which comes out ahead in matchups against a surprising number of 9 & 10 icon weapons. Alternately you could try
Brilliant Wing Amulet, since I had a crazy run of luck with it. (Use it when you see a Stone Club or Hobans Hat, otherwise just use it the turn you use sink, and keep it in your first slot so it get stolen first, since almost nobody knows what it does)
I prefer dual duties myself, but with your defense advantage, I feel it's worthwhile to mention
Patched Magic Hat,
Shiny Shoal Shell Shield, and
Earthen Scorchstone. It might also be worth your while to test out
Sophies Magic Hat as I heard early rumours that it offered better defense than the current IDB listing shows. (if the IDB stats are correct, then it's not worth the current price)