They shadow buffed Pele by making it so her 3 no longer disables when CC'd. Meaning you should almost always have it active during fights. This alone makes her a lot more tankier. Combine that with the healing from the build. You're never dying. If you want even more healing, you can always start with Vampiric Shroud. This will mean you lose a little bit of lane pressure at the start.
Pele has a really strong level 2. Once you have your 1 and 3, and Sunder, stick to the enemy and run them down.
You should just be giga raid boss and never die. Use your 1 on enemies to always fuel up on your passive
They have more Magical Damage, and hurt a lot.
They have a lot of Crit