You do know that in 5e you can get meta magic, with that feat...
As for heavy armour, that actually require you to put some points in strength, or you will be encumbered more or less all the time, i asume you place a 8 in str, meaning you can carry five times that or be encumbered... and a plate armour weighs 65 ?, wich would put you very close to be heavy encumbered... this is offcourse 5e rules, but unless you ignore these rules, having a permanent -10 or -20 move isnt exactly ideal... when you can just use a spell to have more or less "armour", and be silent...
Im not saying its nice and gives you edges, but when you actually break down the rules, you can ultimatly get it most it being a pure wizard, since there is feats and subclasses that gives you access to most things and at level 17, a pure wizard / sorc have access to all spells regardless with wish, ((and so does a cleric with the use of miracle))...
Wish
((The basic use of this spell is to duplicate any other spell of 8th level or lower. You don’t need to meet any requirements in that spell, including costly components. The spell simply takes effect.))
