I'd suggest testing out Smart Moving, which lets your character grab onto ledges, crawl, jump higher and climb fences.
Dynamic Lights is pretty cool too. It allows items in your inventory to emit light, like torches and redstone.
Another mod you could try out is Balkon's Weapons. It adds battleaxes, flails, spears and gunpowder weapons that really fit into survival.
Check them out and tell me if you liked them.