I’ve seen alot of people saying the life link isn’t much worth it. Even if you have shared a huge amount of CON and it increases the party’s max hp alot, you still need to heal the HP added. The duration is only 30s and would be too situational at best.
Cat buffs are good but I am not too sure about staying at sorc 1 as you are missing alot of the control skills from circle 2. The only builds that I have seen which utilizes sorc 1 effectively are those going for necro or alchemist. Necro for the AoE ratio buff and additional summon while alchemist for afk grinding.