Concentration is very important, especially for a caster. May wanna up your constitution. Although u could get warcaster-feat, or pickup armor that gives advantage on con checks.
Have u looked into maybe 10bard/2cleric?.
Maybe go 6bard, then 2cleric. (Knowledge?)
U can gain a lot from it. Dunno what u miss out on.
I am atm a 3bard of swords,2 nature cleric( u can pick other cleric ofc). So much utility added, it's insane!
Great cantrips, bless, decent spells, heavy armor(still using medium), animal speaking/handling, rp flavor. Probably forgetting something..
I lose out on extra attack+lvl3spells, wich is huge ofc..But...
it's balance difficulty. My other party members are doing the DPS/big spells.I compensate this a bit with being the jack of all trades. We need something, I can do it. It's great.