User blog comment:Raye2309/Help with Units!/@comment-25251916-20150103095224/@comment-25816013-20150104075844

As for things like vs. Maxwell and other harder content:

Lilly Matah (shame she's Oracle): Lexida is what I love to use on her. +30% HP is amazing coupled with the doubled hits for those turns between her BB/SBB and regen of health is a GODSEND for Lilly. Blessed Robe is a great sub-sphere to further increase survivability for this super important unit.

As for Grah give him your best stat boosting sphere since he will need every little bit of help he can get to survive.

Lilith works wonders with Leomurg. The survivability is nice + the 1-5 BCs in normal attack help you charge your SBB super quickly. After that the "regen based on DMG dealt" part of Leomurg keeps Lilith self-healing around 4k-5k each turn which is a BIG BIG plus. I guess the sub-sphere can be Sol Creator for more BCs or Steeple Rose for more spark DMG.

Oulu (shame it's Breaker (same for me)) definitely wants Dandelga + Evil Shard for as much BB maintenance as possible.

Exvehl Drevas enough said.

Themis/ Rashil I don't know about Themis but I tested Rashil on Maxwell and it didn't turn out well. Regardless they are both premium healers and as such are excellent units. The best stat-boosting sphere + evil shard should go on them. Survivability + faster healing is always good for a healer.

TL;DR

Lilly Matah: Lexida Blessed Robe        Grah Legwand > Frozen Myth > Providence Ring

Lilith: Leomurg Sol Creator > Steeple Rose

Oulu: Dandelga  Evil Shard

Exvehl: Drevas

Themis/ Rashil: (prioritize over Grah) Legwand > Frozen Myth > Providence Ring   Evil Shard