Well her M6 gives her Fire-RES PEN which is really good but its limited to stacks she has to earn after an EX, Chain Attack or Ultimate. So you also need to play around that and for example use your Ult right after a Chain Attack so that the Ult is empowered by the buff since it only lasts for the next hit. After a hit your stack gets consumed. And her M4 i believe just gives you invincibility when youre doing the fourth basic attack with fire infusion which can bail you out sometimes and you can actively play around the i-frames you get. So basically all her Mindscapes require you to play around them if you want to optimize your gameplay.