This will be my new primary character for AL as my current main character is transitioning to tier 4 and will see infrequent play. I expect to play this character for the next 1-2 years+ with goals of reaching 20th level as tier 4 adventures slowly become available (two will be released this season for example)
Most play will happen in tier 2 & 3.
I should add that unlike many theoretical builds this character will be played from 1st-20th level and so I care about things like uneven progressions, dead levels, or delaying desired build features too long. This will not be a snapshot at various levels but a character that years of time will be invested: he de why I chose this route rather than an EK (as I don't want to wait for over a year before I get haste)
Regarding Alarm: I am aware of this (as I mentioned above about out-of-combat healing (of my ward) of up to 28+INT courtesy of said). I am not really factoring it strongly in my build however as AL modules typically don't give enough time to spam ritual-cast spells for 2HP/spell (most encounters will be no more than 5-10min apart in many adventures making alarm negligable - and occasionally an hour or two apart, but even then it will take 14+ castings of the spell, aka 2hrs+ to max-heal it). Most of that time will usually mean I would need to skip a short rest if I want to spam Alarm (which is typically not worth it as short rests are often a premium in AL)