OK you are level 71 but not that well geared (assuming the warrior in DoN gear is the best geared).
My advice get back into the swing of things with arcstone. If you kill dervishes you can get a spirt mark air) for arms off the named though it does not always drop. There is also a quest for a cloak in arcstone.
After you have the arms and feel comfortable there, go to the firetails. Embra can drop the mold for Pants, Shekar can drop the mold for breastplate. Once a few of you but most importantly the warrior have the BP, arms, and Legs consider going to Depths of Darkhollow..
You may have trouble with some of these missions as you don't have a puller among you but they offer some nice cursor rewards.
Also check out the bazaar, it is not uncommon to find 200+ hp gear in the bazaar for under 5k.
You really want to gear up the Warrior as he is the tank.
Sometime go to Icefall in TSS. Camp polar bears. You want each of the toons to loot 8 icefall bear pelts. There is a quest to turn these in in Valdholme for a bracer. 8 pelts will get you two bracers. Bracers are reasonable AC, 200+ hp, 5 regen 5 mana regen and some stats.
Not being sure how you are set for AA I would recommend catchign up some basic AA at 75. For the warrior you want combat agility 18, combat stability 18 natural durability 3, and some others. I would suggest a minimum of 300 AA for the warrior before going beyond 75.
You can do mold droppers in TSS to get armor upgrades or you can possibly buy some gear in bazaar.
Another option at 75 is to do Katta missions. This can get very boring and repetitive especially if you have to do the easier missions but the Pratorian gear is rather good. Unfortuantely you will need to do anywhere from 50 to 100 missions before you get to Ally and can buy praetorian.
Hide and Seek (solteris progression 1) is probably one of the easier missions.
So that should give you a gear progression path, make goals and a strategy to get them, but then be willing to change from them if you see a great item in the bazaar for a good price.