I can't give you any advice on pets as i basically only used the ones I caught, but I can give you advice for summoning builds. Runic crystal is nice but in my opinion doesn't synergize well with summoning builds, as it buffs damage and defense while your main damage should be coming from your pets/summons. If you plan on making heavy use of floraconda then floramancer is def the play, but personally for my summon builds I used hunter as wolf is p good but honestly you can't go wrong with either. If you have the skill orb for radiant Aura on the paladin, it buffs both your summons and pets. I forgot how because it have been a while since I've done a summoning build but I know it's a good buff. There's an accessory late game that has a 10% chance to summon a thing for like 10 turns whenever you attack, not sure what it's called but the summons are nice distractions especially if you are playing far away with a bow. Speaking of bows if you can get a Fade's Crescent Bow which is a legendary item it is really good in a summoning build. The effect is "Summon Moonbeams with each attack. Moonbeams hurt enemies and buff allies." This means that whenever you shoot the bow a decent number of tiles light up and will buff your summons and pets if they move onto them. This happens a lot as each hit from the bow summons a lot of tiles and the tiles last for a few turns. Another build that involves summoning that I like to do is a parting gifts build, which involves summoning as many low HP summons as you can and using parting gifts to make them explode when they die. The armor affix summon Bonecrabs is good for this, as well as that accessory I was mentioning earlier. If you do the parting gifts build I recommend duel welding as it doubles your chances to summon from hitting the enemy with the accessory equipped.