Are you sure about your gear level? you say i190 with pentamelds, but this should give you closer to 17k health than 15k I thought? I remember being just over 18k (with party buffs) in my first excursions to Alex Savage with full pentamelds and gear from alex normal.

15k does seem rather low, so I'm wondering if everything else is 190. That said, if you do have a full set of pentameld accessories with 29 vit on each then it's a lot easier to just use a Keeper's Hymn. It's MUCH better to keep full pentamelds and be 35 Vit Spec than to be 35 Str, with 4 pentamelds and a vitality accessory. Keepers hymns are basically free.

Just spec Vit for your first foray in there and keep the full penta set, you should be okay as long as your cooldown rotations are on par.