With a team you'll want to OSRS gold get 100+ battle with 75+ Strike and 80+ Power minimum, Plus 75 or greater defence so you're not sat there eating the entire time. Get 52 Summoning to get a Terrorbird in LEAST, if not 67 or whatever for a War Tortoise/68 to get a Bunyip. Increase your magic (to maybe 70) for getting there and to assist contrary to being Mage-raped.
As for armour and weapons at the level I would recommend something accurate and hard hitting (use a whip and you'll just be a waste of space to your team - you would never hit). Helm of Neitiznot. Amulet of Fury (or even Glory in case you can't afford that). Woodcutting Skillcape. 1 Zamorak Arrow (stops enemies attacking you during killcount). Torag's Platelegs. Dragon Boots or Climbing Boots (If you have to walk - make sure these are the 75K ones, they provide a +2 Strength Bonus). Barrows Gloves (Or highest RFD gloves available, I suggest getting at least Rune). Great luck, you've got a great deal of training to do.
I state minimum for staff is 80 attack, 75 def,75 str, 52 summon,60 pray, 75 magic for magic def - People are not minimum stats. Minimum is to be 85/85/85 with 70 prayer and 80 magic and perhaps a fruitbat. As soon as I put the stats you suggested in zybez's combat ability calc it ended up being 96cb. 115cb is the minimal and most teams would ask the 115 to have chaotics.
A fantastic def againest rrange armour (such as torag) -Nez helm, D'hide shirt and torags thighs is fine. Good wepons such as ags or bgs+ claws or sgs or chaotic rapir/maul - Agree. Sharks or better food with super pots - Rocktails would be best, and if you can, extremes/ovls. On scape-xp calc it states it is going to be about 102 particularly I have stats near this and I'm at 106 or 105 I don't really remeber. U need to go into cheap RS gold the hp lvl tho and many teams will accept 100+