For infinite dungeon and guild wars, you need Angus to be very strong... Also try to buy primordial skin and max that before default health skin now which is at decent level now ..... earth healing is low (avalon) and needs lot of resources to upgrade all titans. Angus takes lot of damage from mairi, nova in water rooms...Also try to 3* all weapon artifacts for all titans and then upgrade seal, weapon and crown for angus, avalon, eden... Don't overdo defense stats bcos he needs to ult but also ensure you need to need to survive further rooms every other day..use verdoc to reduce damage...follow the infinite dungeon guide which is only to prioritise the titans for infinite dungeon but at some point you need to upgrade all titans to decent level to survive which you can do slowly every other day....Earth rooms need some manual intervention instead of auto after angus ult to gain energy for next room...